Simulation of Flow Pattern in Open Channels with Sudden Expansions
|
|
- Gwenda Norris
- 6 years ago
- Views:
Transcription
1 Research Journal of Appled Scences, Engneerng and Technology 4(19): , 2012 ISSN: Maxwell Scentfc Organzaton, 2012 Submtted: May 11, 2012 Accepted: June 01, 2012 Publshed: October 01, 2012 Smulaton of Flow Pattern n Open Channels wth Sudden Expansons 1 J. Mamzadeh and 2 S.A. Ayyoubzadeh 1 Department of Water Engneerng, Ilam Unversty, Iran 2 Department of Water Structure, Tarbat Modares Unversty, Iran Abstract: Three-dmensonal flows n sudden expansons of rectangular channels have been nvestgated. In ths research, CFD smulaton model (FLUENT6.2) s used. The k-ε turbulence model s used to smulate turbulence. Desred canal wth coarse, medum and fne mesh sze s selected for smulaton. The results n canal wth sudden expanson showed that the vortex formed by coarse mesh sze and number of teraton more than 400 s asymmetrc and for small and medum mesh sze s symmetrc. In order to analyze expermentally and numercally more closely, the pattern of flow n a flume wth sudden expanson s nvestgated. Results showed that, asymmetrcal flow pattern can be vewed wth some mnor changes such as roughness coeffcent n any part of flume. Keywords: Flow pattern, sudden expanson, symmetrc flow INTRODUCTION Bfurcaton phenomena or crcular flow are frequently encountered n flud mechancs and hydraulcs. Some examples nclude transonc nvscd flows over arfols and cylnders, ncompressble and compressble vscous flows over arfols and ncompressble vscous flows through sudden expansons. The latter s the subect of the present study. A sudden expanson creates a separaton of the boundary layer from the wall, whch results n sgnfcant pressure loss. The magntude of the pressure loss depends upon the Reynolds number and the geometrc expanson rato. In most cases, t s desred to mnmze pressure loss n a ppng system, snce the pressure loss correlates to lost energy. Many expermenters have been observed that the flow n symmetrc expansons s asymmetrc. Some of these stuatons are documented n Graber (1982, 2006) who gave an explanaton of such phenomenon. He provded a predctve method that agreed well wth the expermental observatons and then extended t theoretcally to analyze proposed correctve measures. Asymmetrc flow patterns may occur n perfectly symmetrc abrupt expansons, n whch the man flow deflects and attaches arbtrarly to one wall of the expanson. The adverse effects nclude lengthenng of the dstance to full-wdth flow n expansons, neffcent operaton of screens n screen canals and ncreasng the potental for vortexng n pump ntakes. Cherdron et al. (1978) studed the detaled descrpton of the velocty characterstcs of the asymmetrc flows whch form n symmetrc, two-dmensonal, plane, sudden-expanson geometres by flow vsualzaton and laser-doppler anemometry. The flow and geometry boundary condtons whch gve rse to asymmetrc flow are ndcated and the reason for the phenomenon s shown to le n dsturbances generated at the edge of the expanson and amplfed n the shear layers. Zhou (1995), develop a depth average mathematcal model and test t n a canal wth sudden expanson. Result showed that the flow rate, flow lnes and vortex Formed on both sdes are asymmetrc. Alou and Souhar (2000), presents an expermental study of recrculatng flows downstream of a flat duct sudden expanson. Results of measurements of average and RMS quanttes of the pressure P and the axal velocty U exhbt the asymmetry of the flow behnd the sudden expanson as n the two-dmensonal case. Escuder et al. (2002), reported an expermental nvestgaton of turbulent flow through a plane sudden expanson. Not only was the mean flow found to be strongly asymmetrc, but ntegraton of the mean axal velocty profles revealed sgnfcant departures from two dmensonalty along the centerplane of the expanson duct. The numercal analyss of the turbulent flud flow through an axsymmetrc sudden expanson passage has been carred out by Roy et al. (2010). The recrculaton bubble generated due to the sudden expanson of the passage s observed to reduce n sze and strength wth the ncrease n the Reynolds number. But the sze and strength of the recrculaton bubble ncreases wth the ncrease n the expanson rato. Theoretcal studes have been made by Roul and Dash (2011) to determne the pressure drops caused by abrupt flow area expanson/contracton n small crcular ppes for twophase flow of ar and water mxtures at room Correspondng Author: J. Mamzadeh, 1 Department of Water Engneerng, Ilam Unversty, Iran 3852
2 Res. J. Appl. Sc. Eng. Technol., 4(19): , 2012 temperature and near atmospherc pressure. The pressure drop s determned by extrapolatng the computed pressure profles upstream and downstream of the expanson/contracton. Based on the numercal results as well as expermental data, correlatons are developed for two-phase flow pressure drops caused by the flow area contracton as well as expanson. The above revew research ndcates that few studes done on flow pattern n sudden and gradual expansons and therefore evaluated n ths study. In ths research, flow pattern n sudden expansons studed wth laboratory work and CFD smulaton model. MATERIALS AND METHODS FLUENT s a Computatonal Flud Dynamcs (CFD) software package to smulate flud flow problems. It uses the fnte-volume method to solve the governng equatons for a flud. It provdes the capablty to use dfferent physcal models such as ncompressble or compressble, nvscd or vscous, lamnar or turbulent, etc. Geometry and grd generaton s done usng GAMBIT whch s the preprocessor bundled wth FLUENT. Ths software uses a control-volume-based technque to convert a general scalar transport equaton to an algebrac equaton that can be solved numercally. Pressure-velocty couplng s acheved by usng fve algorthms: SIMPLE, SIMPLEC, PISO, Coupled and Fractonal Step. In the case of ncompressble turbulent flow and averaged n tme, conservaton of mass (1) And momentum conservaton (2) Expressed as follows: u u u t 0 u 1 p g u ( u u ) (1) (2) where, u = velocty component n x drecton, υ = knematc vscosty, ρ = densty, g = gravty acceleraton component n x drecton, p = pressure and = Reynolds stress. Ths equaton contans four man components of the unknown velocty n three drectons and pressure. Also ncludes sx components of unknown Reynolds stress equaton. Thus, system of equatons s not closed and turbulence model must be used. k ε turbulence model s used n ths study. In the other part of research, flow pattern n sudden expansons studed wth laboratory flume n tarbat modares unversty-ran (Mamzadeh, 2009). RESULTS AND DISCUSSION Smulated flow pattern n sudden expanson: Ths part of research, compare the result of flow pattern n a sudden expanson (90 degree angle from centerlne of canal) canal wth FLUENT model and developed mathematcal model by Zhou (1995). The entrance canal s 1.4 m wde and 14 m long and the expanded canal s 2.8 m wde and 14 m long. There s no bed slope n the canal. The upstream entrance veloctes are u = 0.63 m/s, v = 0 and the flow depth y = 0.2 m as the downstream boundary condton s consdered (Fg. 1). In accordance to Fg. 2, the velocty nlet along wth nlet turbulence ntensty and hydraulc depth are the upstream boundary condton and outflow s the downstream boundary condton. Boundary condton for bottom and sde wall of canal s wall. Symmetry boundary condton s used for top of the canal. Hydraulc flow feld detals table s shown n Table 1. Turbulent and under crtcal flow s establshed n canal. Due to the turbulent flow, turbulence models have been used. SIMPLE algorthm for couplng the velocty feld and pressure s used. Fg. 1: Canal for smulaton (Zhou, 1995) 3853
3 Res. J. Appl. Sc. Eng. Technol., 4(19): , 2012 Fg. 2: (a) Coarse mesh: 9726 node, (b) medum mesh: node, (c) fne mesh: node Fg. 3: Flow pattern n canal coarse mesh sze: (a) after 400 teraton, (b) after 2000 teraton Table 1: Hydraulc propertes of canal Turbulence ntensty Hydraulc depth (m) Re Fr V (m/s) Q (m3/s) Desred canal wth coarse, medum and fne mesh sze s selected for smulaton. Coarse and medum mesh sze are Δx = Δy = 0.28 m and Δx = Δy = 0.14 m. Fne mesh sze was carred out n complance wth frst node spacng crtera from the wall. The frst node spacng s calculated for k ε and RSM equal to m. Fgure 2 shows the three types of coarse, medum and fne mesh sze for problem solvng. Fgure 3 showed the results of the coarse grd model after 400 and 2000 teraton. Flow pattern formed after 400 teraton n the Fg. 4a conssts of two symmetrcal vortex on both sdes expanson and a hgh flow velocty n the central lne wll be gradually slowed down n x drecton. Fgure 4b showed that after 2000 Iteraton, the flow dverted to one sde and an asymmetrc flow pattern occurred. Asymmetrc flow pattern n ths case are due to coarse mesh and also added errors for hgher teratons. It should be noted that these results s smlar to Zhou (1995) results. Fgure 4 showed the results of model for the medum and fne mesh. Flow pattern conssts of two symmetrcal vortex on both sdes expanson and a hgh flow velocty n the central lne wll be gradually slowed down n x drecton. Fgure 5 showed comparng the results of model for coarse, medum and fne mesh. Longtudnal and transverse axs represents the canal wdth and velocty magntude respectvely. Durng the 9 m of canal (Fg. 5a) Results do not dffer much, but n sudden expanson place for example 15 m (Fg. 5b), coarse and medum mesh sze do dffer much because of wall functon crtera and the accuracy of ther answers s slghtly low. Also coarse mesh sze showed the hgher velocty magntude n the centerlne of canal rather than medum and fne mesh sze. Flow pattern smulaton n laboratory flume wth sudden expanson: In order to examne more closely the flow pattern n the sudden expanson, a laboratory flume s constructed and a seres of experments were performed on t. Then flume s studed wth fluent numercal model. The flume conssts of two sectons. Secton 1 (Rver secton) have 5 m Length, 16 cm wdth, 30 cm depth and no bed slope. Secton
4 Res. J. Appl. Sc. Eng. Technol., 4(19): , 2012 Fg. 4: Flow pattern n canal: (a) medum mesh sze, (b) fne mesh sze Fg. 5: Result for smulaton (a) coarse mesh, (b) medum mesh, (c) fne mesh Table 2: Hydraulc propertes of flume Turbulence ntensty Hydraulc depth (m) Re Fr V (m/s) Q (L/s) (reservor secton) have 10 m length, 96 cm wdth and longtudnal slope 2%. At the end of flume a wer located wth 45 cm elevaton. Hydraulc flow feld detals gve n Table 2. Turbulent and under crtcal flow n a canal s establshed. Due to the turbulent flow, k-ε and RSM turbulence model s used. SIMPLE algorthm for couplng the velocty feld and pressure s used. In ths case, nput velocty perpendcular to the boundary s used for upstream boundary condton and outflow for downstream boundary condton. In order to calculate the flow feld, turbulence ntensty and hydraulc dameter n upstream 0.3 and 5% s appled, respectvely. Wall boundary condton for the walls and the symmetry boundary condton for top of the canal are appled. Accordng to the frst node Calculaton (4 mm from bottom of canal), mesh near the wall are small and growth 20% n two adacent cells farther from wall. Fgure 6 shows the result of turbulence model n whch flow feld are symmetrcal at dfferent levels of depth, longtudnal and transverse drecton. Smulated flow pattern smulaton wth non-unform roughness and geometry: Flow pattern formed n the laboratory flume wth sudden expanson, usng the numercal model was symmetrcal and was asymmetrc wth the expermental observatons. In the other hand, numercal model and expermental results dd not match together. So n ths part non-unformty of roughness and geometry on the flow pattern s studed. In order to evaluate the effect of non-unform wall roughness on the flow feld, the roughness coeffcent of flume n the left part s selected 50% hgher than rght part of the flume. For evaluaton of non unform 3855
5 Res. J. Appl. Sc. Eng. Technol., 4(19): , 2012 Fg. 6: X velocty n flume Fg. 7: Stream lne for surface layer of flume (a) unform roughness, (b) non unform roughness Fg. 8: Stream lne for surface layer of flume (a) unform geometry, (b) non unform geometry geometry, the wdth of canal measured from the centerlne n the left part s consdered 5% less than rght part of the flume. Fgure 7 and 8 show the streamlne n the surface layer of flow for these two condtons. In the case of same roughness and geometry, rver flows nto the reservor completely symmetrc, whle for the change of the roughness and geometry s deflected to the rght. Increased roughness of the canal and reservor, cause more resstance aganst the flow and the resultng flow s deflected to the rght part. CONCLUSION In ths Research, flow pattern n the sudden expanson are nvestgated. In ths condton for medum and fne mesh sze, the flow pattern was symmetrcal. In the case of coarse mesh sze, ncreasng the number of teratons cause the nstablty of flow and symmetrc flow pattern. Also, the flow pattern n a laboratory flume wth sudden expanson s studed. Symmetrc flow pattern s obtaned n these condtons. Fnally, for study the effect of roughness and geometry 3856
6 Res. J. Appl. Sc. Eng. Technol., 4(19): , 2012 on the flow pattern, the wall of flume s changed and the asymmetry flow observed n ths case. ths result showed that asymmetrc flow pattern could be observed due to mnor changes n flume. REFERENCES Alou, F. and M. Souhar, Expermental study of turbulent asymmetrc flow n a flat duct symmetrc sudden expanson. J. Fluds Eng., 122(1): Cherdron, W., F. Durst and H. Whtelaw, Asymmetrc flows and nstabltes n symmetrc ducts wth sudden expansons. J. Flud Mech., 84: Escuder, M., P. Olvera and R. Poole, Turbulent flow through a plane sudden expanson of modest aspect rato. J. Phys. Fluds, 14(10), DOI: org/ / Graber, D., Asymmetrc flow n symmetrc expansons. J. Hydr. Dv., 108: Graber, D., Asymmetrc flow n symmetrc supercrtcal expansons. J. Hydr. Eng., 132: Mamzadeh, J., The effect of entrance dvergng angle and hydraulc-sedment propertes on pattern of delta progress n dam reservors. Ph.D. thess, Faculty of Agrculture Tarbat Modares Unversty, Iran. Roul, M.K. and S.K. Dash, Two-phase pressure drop caused by sudden flow area contracton/expanson n small crcular ppes. Int. J. Numer. Meth. Fl., 66(11): Roy, V., S. Maumder and D. Sanyal, Analyss of the turbulent flud flow n an ax-symmetrc sudden expanson. Int. J. Eng. Sc. Technol., 2(6): Zhou, G., Velocty depth couplng n shallow water flows. J. Hydr. Eng., 121:
A Numerical Study of Heat Transfer and Fluid Flow past Single Tube
A Numercal Study of Heat ransfer and Flud Flow past Sngle ube ZEINAB SAYED ABDEL-REHIM Mechancal Engneerng Natonal Research Center El-Bohos Street, Dokk, Gza EGYP abdelrehmz@yahoo.com Abstract: - A numercal
More informationFORCED CONVECTION HEAT TRANSFER FROM A RECTANGULAR CYLINDER: EFFECT OF ASPECT RATIO
ISTP-,, PRAGUE TH INTERNATIONAL SYMPOSIUM ON TRANSPORT PHENOMENA FORCED CONVECTION HEAT TRANSFER FROM A RECTANGULAR CYLINDER: EFFECT OF ASPECT RATIO Mohammad Rahnama*, Seyed-Mad Hasheman*, Mousa Farhad**
More informationNUMERICAL SIMULATION OF FLOW OVER STEPPED SPILLWAYS
ISSN: 345-3109 RCEE Research n Cvl and Envronmental Engneerng www.rcee.com Research n Cvl and Envronmental Engneerng 014 (04) 190-198 NUMERICAL SIMULATION OF FLOW OVER STEPPED SPILLWAYS Rasoul Daneshfaraz
More informationAn Experimental and Numerical Study on Pressure Drop Coefficient of Ball Valves
A. Ozdomar, K. Turgut Gursel, Y. Pekbey, B. Celkag / Internatonal Energy Journal 8 (2007) An Expermental and Numercal Study on Pressure Drop Coeffcent of Ball Valves www.serd.at.ac.th/rerc A. Ozdamar*
More informationNumerical Analysis and Optimization on Vortex Shedder by the Linearity of Strouhal Number against Reynold Number
Internatonal Journal of Materals, Mechancs and Manufacturng, Vol. 4, No. 3, August 2016 Numercal Analyss and Optmzaton on Vortex Shedder by the Lnearty of Strouhal Number aganst Reynold Number Su Myat
More informationSTUDY ON TWO PHASE FLOW IN MICRO CHANNEL BASED ON EXPERI- MENTS AND NUMERICAL EXAMINATIONS
Blucher Mechancal Engneerng Proceedngs May 0, vol., num. www.proceedngs.blucher.com.br/evento/0wccm STUDY ON TWO PHASE FLOW IN MICRO CHANNEL BASED ON EXPERI- MENTS AND NUMERICAL EXAMINATIONS Takahko Kurahash,
More informationFlow equations To simulate the flow, the Navier-Stokes system that includes continuity and momentum equations is solved
Smulaton of nose generaton and propagaton caused by the turbulent flow around bluff bodes Zamotn Krll e-mal: krart@gmal.com, cq: 958886 Summary Accurate predctons of nose generaton and spread n turbulent
More informationTHE EFFECT OF TORSIONAL RIGIDITY BETWEEN ELEMENTS ON FREE VIBRATIONS OF A TELESCOPIC HYDRAULIC CYLINDER SUBJECTED TO EULER S LOAD
Journal of Appled Mathematcs and Computatonal Mechancs 7, 6(3), 7- www.amcm.pcz.pl p-issn 99-9965 DOI:.75/jamcm.7.3. e-issn 353-588 THE EFFECT OF TORSIONAL RIGIDITY BETWEEN ELEMENTS ON FREE VIBRATIONS
More informationTurbulent Flow in Curved Square Duct: Prediction of Fluid flow and Heat transfer Characteristics
Internatonal Research Journal of Engneerng and Technology (IRJET) e-issn: 2395-56 Volume: 4 Issue: 7 July -217 www.ret.net p-issn: 2395-72 Turbulent Flow n Curved Square Duct: Predcton of Flud flow and
More informationINTERROGATING THE FLOW BEHAVIOUR IN A NOVEL MAGNETIC DESICCANT VENTILATION SYSTEM USING COMPUTATIONAL FLUID DYNAMICS (CFD)
INTERROGATING THE FLOW BEHAVIOUR IN A NOVEL MAGNETIC DESICCANT VENTILATION SYSTEM USING COMPUTATIONAL FLUID DYNAMICS (CFD) Auwal Dodo*, Valente Hernandez-Perez, Je Zhu and Saffa Rffat Faculty of Engneerng,
More informationTHE NEAR-WALL INFLUENCE ON THE FLOW AROUND A SINGLE SQUARE CYLINDER.
THE NEAR-WALL INFLUENCE ON THE FLOW AROUND A SINGLE SQUARE CYLINDER. Campregher, Rubens Faculty of Mechancal Engneerng, FEMEC Federal Unversty of Uberlânda, UFU 38400-902 Uberlânda - Brazl campregher@mecanca.ufu.br
More informationGrid Generation around a Cylinder by Complex Potential Functions
Research Journal of Appled Scences, Engneerng and Technolog 4(): 53-535, 0 ISSN: 040-7467 Mawell Scentfc Organzaton, 0 Submtted: December 0, 0 Accepted: Januar, 0 Publshed: June 0, 0 Grd Generaton around
More informationCFD VALIDATION OF STRATIFIED TWO-PHASE FLOWS IN A HORIZONTAL CHANNEL
CFD VALIDATION OF STRATIFIED TWO-PHASE FLOWS IN A HORIZONTAL CHANNEL 1. Introducton Chrstophe Vallée and Thomas Höhne In dfferent scenaros of small break Loss of Coolant Accdent (SB-LOCA), stratfed twophase
More informationNumerical Analysis of Heat Transfer and Pressure Drop in a Channel Equipped with Triangular Bodies in Side-By-Side Arrangement
mercal Analyss of Heat Transfer and Pressure Drop n a Channel Equpped wth Trangular Bodes n Sde-By-Sde Arrangement E. Manay Department of Mechancal Engneerng, Faculty of Engneerng, Bayburt Unversty, Bayburt,
More informationA Comparative Investigation into Aerodynamic Performances of Two Set Finned Bodies with Circular and Non Circular Cross Sections
A Comparatve Investgaton nto Aerodynamc Performances of Two Set Fnned Bodes wth Crcular and Non Crcular Cross Sectons MAHMOUD MANI and SHADI MAHJOOB Aerospace Engneerng Department Amrkabr Unversty of Technology
More informationWeek3, Chapter 4. Position and Displacement. Motion in Two Dimensions. Instantaneous Velocity. Average Velocity
Week3, Chapter 4 Moton n Two Dmensons Lecture Quz A partcle confned to moton along the x axs moves wth constant acceleraton from x =.0 m to x = 8.0 m durng a 1-s tme nterval. The velocty of the partcle
More informationNumerical Heat and Mass Transfer
Master degree n Mechancal Engneerng Numercal Heat and Mass Transfer 06-Fnte-Dfference Method (One-dmensonal, steady state heat conducton) Fausto Arpno f.arpno@uncas.t Introducton Why we use models and
More informationNumerical simulation of flow past circular duct
Water Scence and Engneerng, 010, 3(): 08-16 do:10.388/.ssn.1674-370.010.0.009 http://.aterournal.cn e-mal: se008@vp.163.com Numercal smulaton of flo past crcular duct Ze-gao YIN* 1, Xan-e Cao 1, Hong-da
More information3-D NUMERICAL SIMULATION OF FLOW AND CLEAR WATER SCOUR BY INTERACTION BETWEEN BRIDGE PIERS
Tenth Internatonal Water Technology Conference, IWTC10 2006, Aleandra, Egypt 899 3-D NMERICAL SIMLATION OF FLOW AND CLEAR WATER SCOR BY INTERACTION BETWEEN BRIDGE PIERS Gamal A. A. Abouzed, Hassan I. Mohamed
More informationSIMULATION OF SOUND WAVE PROPAGATION IN TURBULENT FLOWS USING A LATTICE-BOLTZMANN SCHEME. Abstract
SIMULATION OF SOUND WAVE PROPAGATION IN TURBULENT FLOWS USING A LATTICE-BOLTZMANN SCHEME PACS REFERENCE: 43.20.Mv Andreas Wlde Fraunhofer Insttut für Integrerte Schaltungen, Außenstelle EAS Zeunerstr.
More informationNumerical Studies on Flow Features past a Backward Facing Sharp Edge Step Introducing Hybrid RANS-LES
ISSN NO : 49-7455 Numercal Studes on Flow Features past a Backward Facng Sharp Edge Step Introducng Hybrd RANS-LES Abstract Dr. Nrmal Kumar Kund Assocate Professor, Department of Producton Engneerng Veer
More informationTurbulent Flow. Turbulent Flow
http://www.youtube.com/watch?v=xoll2kedog&feature=related http://br.youtube.com/watch?v=7kkftgx2any http://br.youtube.com/watch?v=vqhxihpvcvu 1. Caothc fluctuatons wth a wde range of frequences and
More informationNUMERICAL MODEL FOR NON-DARCY FLOW THROUGH COARSE POROUS MEDIA USING THE MOVING PARTICLE SIMULATION METHOD
THERMAL SCIENCE: Year 2018, Vol. 22, No. 5, pp. 1955-1962 1955 NUMERICAL MODEL FOR NON-DARCY FLOW THROUGH COARSE POROUS MEDIA USING THE MOVING PARTICLE SIMULATION METHOD Introducton by Tomok IZUMI a* and
More informationNumerical Simulation of Lid-Driven Cavity Flow Using the Lattice Boltzmann Method
Proceedngs of the 3th WSEAS Internatonal Conference on APPLIED MATHEMATICS (MATH'8) Numercal Smulaton of Ld-Drven Cavty Flow Usng the Lattce Boltzmann Method M.A. MUSSA, S. ABDULLAH *, C.S. NOR AZWADI
More information2 MODELS A typcal hgh-sded artculated lorry, whch was nvestgated extensvely by Baker and hs colleagues n wnd tunnels and later used n the dynamc analy
The Seventh Internatonal Colloquum on Bluff Body Aerodynamcs and Applcatons (BBAA7) Shangha, Chna; September 2-6, 2012 Determnaton of aerodynamc characterstcs of a vehcle mmerged n the wake of brdge tower
More informationA Hybrid Variational Iteration Method for Blasius Equation
Avalable at http://pvamu.edu/aam Appl. Appl. Math. ISSN: 1932-9466 Vol. 10, Issue 1 (June 2015), pp. 223-229 Applcatons and Appled Mathematcs: An Internatonal Journal (AAM) A Hybrd Varatonal Iteraton Method
More informationA NUMERICAL STUDY OF HEAT TRANSFER AND FLUID FLOW IN A BANK OF TUBES WITH INTEGRAL WAKE SPLITTER
INTERNATIONAL JOURNAL OF MECHANICAL ENGINEERING AND TECHNOLOGY (IJMET) ISSN 0976 6340 (Prnt) ISSN 0976 6359 (Onlne) Volume 5, Issue 12, December (2014), pp. 36-46 IAEME: www.aeme.com/ijmet.asp Journal
More informationSimulated Power of the Discrete Cramér-von Mises Goodness-of-Fit Tests
Smulated of the Cramér-von Mses Goodness-of-Ft Tests Steele, M., Chaselng, J. and 3 Hurst, C. School of Mathematcal and Physcal Scences, James Cook Unversty, Australan School of Envronmental Studes, Grffth
More informationA large scale tsunami run-up simulation and numerical evaluation of fluid force during tsunami by using a particle method
A large scale tsunam run-up smulaton and numercal evaluaton of flud force durng tsunam by usng a partcle method *Mtsuteru Asa 1), Shoch Tanabe 2) and Masaharu Isshk 3) 1), 2) Department of Cvl Engneerng,
More informationNUMERICAL INVESTIGATION OF THE TURBULENT FLOW PARAMETERS DISTRIBUTION IN A PARTLY PERFORATED HORIZONTAL WELLBORE
NUMERICAL INVESTIGATION OF THE TURBULENT FLOW PARAMETERS DISTRIBUTION IN A PARTLY PERFORATED HORIZONTAL WELLBORE Mohammed Abdulwahhab Abdulwahd Research Scholar, Department of Marne Engneerng, Andhra Unversty,
More informationModule 1 : The equation of continuity. Lecture 1: Equation of Continuity
1 Module 1 : The equaton of contnuty Lecture 1: Equaton of Contnuty 2 Advanced Heat and Mass Transfer: Modules 1. THE EQUATION OF CONTINUITY : Lectures 1-6 () () () (v) (v) Overall Mass Balance Momentum
More informationNumerical Modelling and Experimental Validation of a Turbulent Separated Reattached Flow
Numercal Modellng and Expermental Valdaton of a Turbulent Separated Reattached Flow Florn Popescu, Tănase Panat Abstract An expermental study was conducted to analyse the feld velocty of a fully developed
More information3-D Numerical computations of turbulence in a partially vegetated shallow channel
Rver Flow 010 - Dttrch, Koll, Aberle & Gesenhaner (eds) - 010 Bundesanstalt für Wasserbau ISBN 978-3-93930-00-7 3-D Numercal computatons of turbulence n a partally vegetated shallow channel D. Soulots
More informationHigh resolution entropy stable scheme for shallow water equations
Internatonal Symposum on Computers & Informatcs (ISCI 05) Hgh resoluton entropy stable scheme for shallow water equatons Xaohan Cheng,a, Yufeng Ne,b, Department of Appled Mathematcs, Northwestern Polytechncal
More informationCOMPOSITE BEAM WITH WEAK SHEAR CONNECTION SUBJECTED TO THERMAL LOAD
COMPOSITE BEAM WITH WEAK SHEAR CONNECTION SUBJECTED TO THERMAL LOAD Ákos Jósef Lengyel, István Ecsed Assstant Lecturer, Professor of Mechancs, Insttute of Appled Mechancs, Unversty of Mskolc, Mskolc-Egyetemváros,
More informationPerfect Fluid Cosmological Model in the Frame Work Lyra s Manifold
Prespacetme Journal December 06 Volume 7 Issue 6 pp. 095-099 Pund, A. M. & Avachar, G.., Perfect Flud Cosmologcal Model n the Frame Work Lyra s Manfold Perfect Flud Cosmologcal Model n the Frame Work Lyra
More informationIC Engine Flow Simulation using KIVA code and A Modified Reynolds Stress Turbulence Model
IC Engne Flow Smulaton usng KIVA code and A Modfed Reynolds Stress Turbulence Model Satpreet Nanda and S.L. Yang Mechancal Engneerng-Engneerng Mechancs Department Mchgan Technologcal Unversty Houghton,
More informationAirflow and Contaminant Simulation with CONTAM
Arflow and Contamnant Smulaton wth CONTAM George Walton, NIST CHAMPS Developers Workshop Syracuse Unversty June 19, 2006 Network Analogy Electrc Ppe, Duct & Ar Wre Ppe, Duct, or Openng Juncton Juncton
More informationTensor Smooth Length for SPH Modelling of High Speed Impact
Tensor Smooth Length for SPH Modellng of Hgh Speed Impact Roman Cherepanov and Alexander Gerasmov Insttute of Appled mathematcs and mechancs, Tomsk State Unversty 634050, Lenna av. 36, Tomsk, Russa RCherepanov82@gmal.com,Ger@npmm.tsu.ru
More information(Online First)A Lattice Boltzmann Scheme for Diffusion Equation in Spherical Coordinate
Internatonal Journal of Mathematcs and Systems Scence (018) Volume 1 do:10.494/jmss.v1.815 (Onlne Frst)A Lattce Boltzmann Scheme for Dffuson Equaton n Sphercal Coordnate Debabrata Datta 1 *, T K Pal 1
More informationNumerical analysis of fluid flow properties in a partially perforated horizontal wellbore
Amercan Journal of Energy Engneerng 2014; 2(6): 133-140 Publshed onlne December 23, 2014 (http://wwwscencepublshnggroupcom/j/ajee) do: 1011648/jajee2014020612 ISSN: 2329-1648 (Prnt); ISSN: 2329-163X (Onlne)
More informationOne-sided finite-difference approximations suitable for use with Richardson extrapolation
Journal of Computatonal Physcs 219 (2006) 13 20 Short note One-sded fnte-dfference approxmatons sutable for use wth Rchardson extrapolaton Kumar Rahul, S.N. Bhattacharyya * Department of Mechancal Engneerng,
More informationLab 2e Thermal System Response and Effective Heat Transfer Coefficient
58:080 Expermental Engneerng 1 OBJECTIVE Lab 2e Thermal System Response and Effectve Heat Transfer Coeffcent Warnng: though the experment has educatonal objectves (to learn about bolng heat transfer, etc.),
More informationMean flow characteristics, vertical structures and bed shear stress at open channel bifurcation
P a g e 99 Journal of Appled Research n Water and Wastewater 7(017) 99-304 Orgnal paper Mean flow characterstcs, vertcal structures and bed shear stress at open channel bfurcaton Abar Safarzadeh 1,*, Baba
More informationUNSTEADY LAMINAR CONVECTION FLOW OVER PERIODIC GROOVES BY USING SIO 2 -WATER NANOFLUID
UNSTEADY LAMINAR CONVECTION FLOW OVER PERIODIC GROOVES BY USING SIO -WATER NANOFLUID AMIRHOSSEIN HESHMATI, MOHAMMAD PARSAZADEH & FARSHID FATHINIA 3,&3 Department of Mechancal Engneerng, Unversty Technology
More informationModule 3 LOSSY IMAGE COMPRESSION SYSTEMS. Version 2 ECE IIT, Kharagpur
Module 3 LOSSY IMAGE COMPRESSION SYSTEMS Verson ECE IIT, Kharagpur Lesson 6 Theory of Quantzaton Verson ECE IIT, Kharagpur Instructonal Objectves At the end of ths lesson, the students should be able to:
More informationPrinciples of Food and Bioprocess Engineering (FS 231) Solutions to Example Problems on Heat Transfer
Prncples of Food and Boprocess Engneerng (FS 31) Solutons to Example Problems on Heat Transfer 1. We start wth Fourer s law of heat conducton: Q = k A ( T/ x) Rearrangng, we get: Q/A = k ( T/ x) Here,
More informationVarious Speed Ratios of Two-Sided Lid-Driven Cavity Flow using Lattice Boltzmann Method
Penerbt and Thermal Scences ISSN (onlne): 2289-7879 Varous Speed Ratos of Two-Sded Ld-Drven Cavty Flow usng Lattce Boltzmann Method Nor Azwad Che Sdk *,a and St Asyah Razal b Department of Thermo-Fluds,
More informationIntroduction to Computational Fluid Dynamics
Introducton to Computatonal Flud Dynamcs M. Zanub 1, T. Mahalakshm 2 1 (PG MATHS), Department of Mathematcs, St. Josephs College of Arts and Scence for Women-Hosur, Peryar Unversty 2 Assstance professor,
More informationTurbulence and its Modelling
School of Mechancal Aerospace and Cvl Engneerng 3rd Year Flud Mechancs Introducton In earler lectures we have consdered how flow nstabltes develop, and noted that above some crtcal Reynolds number flows
More informationA Cartesian-grid integrated-rbf method for viscoelastic flows
Home Search Collectons Journals About Contact us My IOPscence A Cartesan-grd ntegrated-rbf method for vscoelastc flows Ths artcle has been downloaded from IOPscence. Please scroll down to see the full
More informationNumerical Studies on Supersonic Turbulent Flow over a Backward Facing Sharp Edge Step Using Hybrid RANS-LES
www.eter.everscence.org Numercal Studes on Supersonc Turbulent Flow over a Bacward Facng Sharp Edge Step Usng Hybrd RANS-LES Dr. Nrmal Kumar Kund Assocate Professor, Department of Producton Engneerng,
More informationBasic concept of reactive flows. Basic concept of reactive flows Combustion Mixing and reaction in high viscous fluid Application of Chaos
Introducton to Toshhsa Ueda School of Scence for Open and Envronmental Systems Keo Unversty, Japan Combuston Mxng and reacton n hgh vscous flud Applcaton of Chaos Keo Unversty 1 Keo Unversty 2 What s reactve
More informationAerodynamics. Finite Wings Lifting line theory Glauert s method
α ( y) l Γ( y) r ( y) V c( y) β b 4 V Glauert s method b ( y) + r dy dγ y y dy Soluton procedure that transforms the lftng lne ntegro-dfferental equaton nto a system of algebrac equatons - Restrcted to
More informationDesign optimization of a high specific speed Francis turbine runner
IOP Conference Seres: Earth and Envronmental Scence Desgn optmzaton of a hgh specfc speed Francs turbne runner To cte ths artcle: Y Enomoto et al 2012 IOP Conf. Ser.: Earth Envron. Sc. 15 032010 Vew the
More informationAdiabatic Sorption of Ammonia-Water System and Depicting in p-t-x Diagram
Adabatc Sorpton of Ammona-Water System and Depctng n p-t-x Dagram J. POSPISIL, Z. SKALA Faculty of Mechancal Engneerng Brno Unversty of Technology Techncka 2, Brno 61669 CZECH REPUBLIC Abstract: - Absorpton
More informationSimulation of Turbulent Flow Using FEM
Internatonal Journal of Engneerng and Technology Volume 2 No. 8, August, 2012 Smulaton of Turbulent Flow Usng FEM Sabah Tamm College of Computng, AlGhurar Unversty, Duba, Unted Arab Emrates. ABSTRACT An
More informationThermal-Fluids I. Chapter 18 Transient heat conduction. Dr. Primal Fernando Ph: (850)
hermal-fluds I Chapter 18 ransent heat conducton Dr. Prmal Fernando prmal@eng.fsu.edu Ph: (850) 410-6323 1 ransent heat conducton In general, he temperature of a body vares wth tme as well as poston. In
More informationNumerical Transient Heat Conduction Experiment
Numercal ransent Heat Conducton Experment OBJECIVE 1. o demonstrate the basc prncples of conducton heat transfer.. o show how the thermal conductvty of a sold can be measured. 3. o demonstrate the use
More informationNON-CENTRAL 7-POINT FORMULA IN THE METHOD OF LINES FOR PARABOLIC AND BURGERS' EQUATIONS
IJRRAS 8 (3 September 011 www.arpapress.com/volumes/vol8issue3/ijrras_8_3_08.pdf NON-CENTRAL 7-POINT FORMULA IN THE METHOD OF LINES FOR PARABOLIC AND BURGERS' EQUATIONS H.O. Bakodah Dept. of Mathematc
More informationmodeling of equilibrium and dynamic multi-component adsorption in a two-layered fixed bed for purification of hydrogen from methane reforming products
modelng of equlbrum and dynamc mult-component adsorpton n a two-layered fxed bed for purfcaton of hydrogen from methane reformng products Mohammad A. Ebrahm, Mahmood R. G. Arsalan, Shohreh Fatem * Laboratory
More informationNumerical Study of Propane-Air Mixture Combustion in a Burner Element
Defect and Dffuson Forum Vols. 73-76 (8 pp 144-149 onlne at http://www.scentfc.net (8 Trans Tech Publcatons, Swtzerland Onlne avalable snce 8/Feb/11 Numercal Study of Propane-Ar Mxture Combuston n a Burner
More informationAP Physics 1 & 2 Summer Assignment
AP Physcs 1 & 2 Summer Assgnment AP Physcs 1 requres an exceptonal profcency n algebra, trgonometry, and geometry. It was desgned by a select group of college professors and hgh school scence teachers
More informationInductance Calculation for Conductors of Arbitrary Shape
CRYO/02/028 Aprl 5, 2002 Inductance Calculaton for Conductors of Arbtrary Shape L. Bottura Dstrbuton: Internal Summary In ths note we descrbe a method for the numercal calculaton of nductances among conductors
More informationResearch & Reviews: Journal of Engineering and Technology
Research & Revews: Journal of Engneerng and Technology Case Study to Smulate Convectve Flows and Heat Transfer n Arcondtoned Spaces Hussen JA 1 *, Mazlan AW 1 and Hasanen MH 2 1 Department of Mechancal
More informationDUE: WEDS FEB 21ST 2018
HOMEWORK # 1: FINITE DIFFERENCES IN ONE DIMENSION DUE: WEDS FEB 21ST 2018 1. Theory Beam bendng s a classcal engneerng analyss. The tradtonal soluton technque makes smplfyng assumptons such as a constant
More informationA STUDY ON THE PHYSICS OF SUPERSONIC MIXING FIELD WITH INJECTION AT DIFFERENT ANGLES
Proceedngs of the Internatonal Conference on Mechancal Engneerng 23 (ICME23) 26-28 December 23 Dhaka Bangladesh ICME3-FL-18 A STUDY ON THE PHYSICS OF SUPERSONIC MIXING FIELD WITH INJECTION AT DIFFERENT
More informationComputational investigation of the external excitation frequency effect on liquid sloshing phenomenon
Computatonal nvestgaton of the external exctaton frequency effect on lqud sloshng phenomenon Abdallah Bouabd *, Zed Drss, Laboratory of Electro-Mechanc Systems (LASEM) Natonal School of Engneers of Sfax
More informationThe unsteady flow characteristic research on the initial period flow of micro channel
Avalable onlne www.ocpr.com Journal of Chemcal and Pharmaceutcal Research, 2014, 6(6):2020-2024 Research Artcle ISSN : 0975-7384 CODEN(USA) : JCPRC5 The unsteady flow characterstc research on the ntal
More informationCOMPARISON OF SOME RELIABILITY CHARACTERISTICS BETWEEN REDUNDANT SYSTEMS REQUIRING SUPPORTING UNITS FOR THEIR OPERATIONS
Avalable onlne at http://sck.org J. Math. Comput. Sc. 3 (3), No., 6-3 ISSN: 97-537 COMPARISON OF SOME RELIABILITY CHARACTERISTICS BETWEEN REDUNDANT SYSTEMS REQUIRING SUPPORTING UNITS FOR THEIR OPERATIONS
More informationNUMERICAL SIMULATION OF TURBULENT FLOW AROUND A BUILDING COMPLEX
BBAA VI Internatonal Colloquum on: Bluff Bodes Aerodynamcs & Applcatons lano, Italy, July, 0-4 008 NUEICAL SIULATION OF TUBULENT FLOW AOUND A BUILDING COPLEX Sungsu Lee, Choon-Bum Cho, Kyung-Soo Yang and
More informationWeek 9 Chapter 10 Section 1-5
Week 9 Chapter 10 Secton 1-5 Rotaton Rgd Object A rgd object s one that s nondeformable The relatve locatons of all partcles makng up the object reman constant All real objects are deformable to some extent,
More informationSTUDY OF A THREE-AXIS PIEZORESISTIVE ACCELEROMETER WITH UNIFORM AXIAL SENSITIVITIES
STUDY OF A THREE-AXIS PIEZORESISTIVE ACCELEROMETER WITH UNIFORM AXIAL SENSITIVITIES Abdelkader Benchou, PhD Canddate Nasreddne Benmoussa, PhD Kherreddne Ghaffour, PhD Unversty of Tlemcen/Unt of Materals
More informationA NEW FILTERED DYNAMIC SUBGRID-SCALE MODEL FOR LARGE EDDY SIMULATION OF INDOOR AIRFLOW
A NEW FILTERED DYNAMIC SUBGRID-SCALE MODEL FOR LARGE EDDY SIMULATION OF INDOOR AIRFLOW We Zhang and Qngyan Chen Buldng Technology Program Massachusetts Insttute of Technology 77 Mass. Ave., Cambrdge, MA
More informationAERODYNAMICS I LECTURE 6 AERODYNAMICS OF A WING FUNDAMENTALS OF THE LIFTING-LINE THEORY
LECTURE 6 AERODYNAMICS OF A WING FUNDAMENTALS OF THE LIFTING-LINE THEORY The Bot-Savart Law The velocty nduced by the sngular vortex lne wth the crculaton can be determned by means of the Bot- Savart formula
More informationPOLYMER MELT FLOW IN SUDDEN EXPANSIONS: THE EFFECTS OF VISCOUS HEATING
POLYMER MELT FLOW IN SUDDEN EXPANSIONS: THE EFFECTS OF VISCOUS HEATING P. S. B. Zdansk a, M. Vaz. Jr. a, and A. P. C. Das a a Unversdade do Estado de Santa Catarna Departamento de Engenhara Mecânca Barro
More informationThe Governing Equations
The Governng Equatons L. Goodman General Physcal Oceanography MAR 555 School for Marne Scences and Technology Umass-Dartmouth Dynamcs of Oceanography The Governng Equatons- (IPO-7) Mass Conservaton and
More informationStudy on Effect of Different Porosity on Thermally Driven Heat Transfer in a Centrifugal Force Field
5th Internatonal Conference on Cvl Engneerng and Transportaton (ICCET 015) Study on Effect of Dfferent Porosty on Thermally Drven Heat Transfer n a Centrfugal Force Feld 1 Xa Je1,a*, Chang Ha-png,b, and
More informationThe Discretization Process
FMIA F Moukalled L Mangan M Darwsh An Advanced Introducton wth OpenFOAM and Matlab Ths textbook explores both the theoretcal foundaton of the Fnte Volume Method (FVM) and ts applcatons n Computatonal Flud
More informationEFFECT OF THE SIZE OF GRADED BAFFLES ON THE PERFORMANCE OF CHANNEL HEAT EXCHANGERS
EFFECT OF THE SIZE OF GRADED BAFFLES ON THE PERFORMANCE OF CHANNEL HEAT EXCHANGERS Djamel SAHEL 1, Houar AMEUR 2,*, and Bak TOUHAMI 3 1 Techncal Scences Department, Unversty of Amar Teldj, Laghouat, Algera
More informationCOEFFICIENT DIAGRAM: A NOVEL TOOL IN POLYNOMIAL CONTROLLER DESIGN
Int. J. Chem. Sc.: (4), 04, 645654 ISSN 097768X www.sadgurupublcatons.com COEFFICIENT DIAGRAM: A NOVEL TOOL IN POLYNOMIAL CONTROLLER DESIGN R. GOVINDARASU a, R. PARTHIBAN a and P. K. BHABA b* a Department
More informationCOMPUTATIONAL STUDY OF SUPERSONIC FLOW THROUGH A CONVERGING DIVERGING NOZZLE
Engneerng e-transacton (ISSN 183-6379) Vol. 6, No. 1, June 011, pp 37-4 Onlne at http://eum.fsktm.um.edu.my Receved 5 October, 010; Accepted 30 December, 010 COMPUTATIONAL STUDY OF SUPERSONIC FLOW THROUGH
More informationHeat Transfer and Turbulent Nanofluid Flow over a Double Forward- Facing Step
Amercan Internatonal Journal of Research n Scence, Technology, Engneerng & Mathematcs Avalable onlne at http://www.asr.net ISSN (Prnt): 2328-3491, ISSN (Onlne): 2328-358, ISSN (CD-ROM): 2328-3629 AIJRSTEM
More informationPARAMETRIC STUDY ON AIR CORE PHENOMENA AT LIQUID DRAINING FROM CYLINDRICAL TANK
Blucher Mechancal Engneerng Proceedngs May 2014, vol. 1, num. 1 www.proceedngs.blucher.com.br/evento/10wccm PARAMETRIC STUDY ON AIR CORE PHENOMENA AT LIQUID DRAINING FROM CYLINDRICAL TANK I. S. Park 1,
More informationMEASUREMENT OF MOMENT OF INERTIA
1. measurement MESUREMENT OF MOMENT OF INERTI The am of ths measurement s to determne the moment of nerta of the rotor of an electrc motor. 1. General relatons Rotatng moton and moment of nerta Let us
More informationAbstract. 1 Introduction
Numercal models for unsteady flow n ppe dvdng systems R. Klasnc," H. Knoblauch," R. Mader* ^ Department of Hydraulc Structures and Water Resources Management, Graz Unversty of Technology, A-8010, Graz,
More informationLATTICE BOLTZMANN SIMULATION OF FLOW OVER A CIRCULAR CYLINDER AT MODERATE REYNOLDS NUMBERS
THERMAL SCIENCE: Year 014, Vol. 18, No. 4, pp. 135-146 135 LATTICE BOLTZMANN SIMULATION OF FLOW OVER A CIRCULAR CYLINDER AT MODERATE REYNOLDS NUMBERS by Dharmaraj ARUMUGA PERUMAL a*, Gundavarapu V. S.
More informationELASTIC WAVE PROPAGATION IN A CONTINUOUS MEDIUM
ELASTIC WAVE PROPAGATION IN A CONTINUOUS MEDIUM An elastc wave s a deformaton of the body that travels throughout the body n all drectons. We can examne the deformaton over a perod of tme by fxng our look
More informationEnergy configuration optimization of submerged propeller in oxidation ditch based on CFD
IOP Conference Seres: Earth and Envronmental Scence Energy confguraton optmzaton of submerged propeller n oxdaton dtch based on CFD To cte ths artcle: S Y Wu et al 01 IOP Conf. Ser.: Earth Envron. Sc.
More informationExperiment 1 Mass, volume and density
Experment 1 Mass, volume and densty Purpose 1. Famlarze wth basc measurement tools such as verner calper, mcrometer, and laboratory balance. 2. Learn how to use the concepts of sgnfcant fgures, expermental
More informationThe Finite Element Method
The Fnte Element Method GENERAL INTRODUCTION Read: Chapters 1 and 2 CONTENTS Engneerng and analyss Smulaton of a physcal process Examples mathematcal model development Approxmate solutons and methods of
More informationSurvey of applications of discrete vortex method in civil engineering
Budownctwo Archtektura 5 (2009) 29-38 Survey of applcatons of dscrete vortex method n cvl engneerng Tomasz Nowck Lubln Unversty of Technology, Faculty of Cvl Engneerng and Archtecture, Department of Structural
More informationEXAMPLES of THEORETICAL PROBLEMS in the COURSE MMV031 HEAT TRANSFER, version 2017
EXAMPLES of THEORETICAL PROBLEMS n the COURSE MMV03 HEAT TRANSFER, verson 207 a) What s eant by sotropc ateral? b) What s eant by hoogeneous ateral? 2 Defne the theral dffusvty and gve the unts for the
More informationOPTIMIZATION ANALYSIS FOR LOUVER-FINNED HEAT EXCHANGERS
- 1 - OPTIMIZATION ANALYSIS FOR LOUVER-FINNED HEAT EXCHANGERS Jn-Yuh Jang, Professor,Department of Mechancal Engneerng, Natonal Cheng Kung Unversty, Tanan, Tawan 70101, Bng-Ze L, graduate student,,department
More informationA new Approach for Solving Linear Ordinary Differential Equations
, ISSN 974-57X (Onlne), ISSN 974-5718 (Prnt), Vol. ; Issue No. 1; Year 14, Copyrght 13-14 by CESER PUBLICATIONS A new Approach for Solvng Lnear Ordnary Dfferental Equatons Fawz Abdelwahd Department of
More informationSimulation and experiment of the effect of clearance of impeller wear-rings on the performance of centrifugal pump
IOP Conference Seres: Earth and Envronmental Scence Smulaton and experment of the effect of clearance of mpeller wear-rngs on the performance of centrfugal pump To cte ths artcle: S X Chen et al 01 IOP
More informationFEATURES OF TURBULENT TRANSPORT OF MOMENTUM AND HEAT IN STABLY STRATIFIED BOUNDARY LAYERS AND THEIR REPRODUCTION IN ATMOSPHERIC MESOSCALE MODELS
C I T E S 009_ Krasnoyarsk 009 FEATURES OF TURBULENT TRANSPORT OF MOMENTUM AND HEAT IN STABLY STRATIFIED BOUNDARY LAYERS AND THEIR REPRODUCTION IN ATMOSPHERIC MESOSCALE MODELS A. F. Kurbatsky Insttute
More informationOperating conditions of a mine fan under conditions of variable resistance
Paper No. 11 ISMS 216 Operatng condtons of a mne fan under condtons of varable resstance Zhang Ynghua a, Chen L a, b, Huang Zhan a, *, Gao Yukun a a State Key Laboratory of Hgh-Effcent Mnng and Safety
More informationA Fast Computer Aided Design Method for Filters
2017 Asa-Pacfc Engneerng and Technology Conference (APETC 2017) ISBN: 978-1-60595-443-1 A Fast Computer Aded Desgn Method for Flters Gang L ABSTRACT *Ths paper presents a fast computer aded desgn method
More information1. Why turbulence occur? Hydrodynamic Instability. Hydrodynamic Instability. Centrifugal Instability: Rayleigh-Benard Instability:
. Why turbulence occur? Hydrodynamc Instablty Hydrodynamc Instablty T Centrfugal Instablty: Ω Raylegh-Benard Instablty: Drvng force: centrfugal force Drvng force: buoyancy flud Dampng force: vscous dsspaton
More information