EFFECT OF PITCH NUMBER IN OVERALL HEAT TRANSFER RATE IN DOUBLE PIPE HELICAL HEAT EXCHANGER
|
|
- Winifred Reeves
- 5 years ago
- Views:
Transcription
1 Volume 116 No , 1-6 ISSN: (printed version); ISSN: (on-line version) url: ijpam.eu EFFECT OF PITCH NUMBER IN OVERALL HEAT TRANSFER RATE IN DOUBLE PIPE HELICAL HEAT EXCHANGER T.Kanthimathi 1, Naga Sai Ram.Gopisetti 2, Bharamara 3, PRishyank.Ch 4 1 Assistant Professor, Department of Mehanial Engineering, K L University, India 2 Under Graduate, Department of Mehanial Engineering, K L University, India 2 sairam27@hotmail.om 3 Assoiate Professor, Mehanial Engineering, JNTU Collage of Engineerign,India Abstrat: The aim of the following researh to study the tube in tube helial oil heat exhanger where with inrease in the pith will inrease the overall heat transfer rate. Sine that tube in tube, helial oil often taken small area and the height of the tube in tube helial oil heat exhanger an be onfigured by the relation index proposed in the following paper. The heat transfer rate in the heat exhanger depended on the heat transfer oeffiient, surfae area and temperature differene. Geometry of the heat transfer area and the turbulene fator plays a major role in the enhanement of the heat transfer rate, In this paper numerial analysis of a tube in tube helial oil heat exhanger is done using Ansys Fluent as a ounter flow arrangement. The pith of the helial tube is varied for the onstant length of the oil and the overall heat transfer rate is alulated. Results have shown that as the pith is redued the heat transfer rate is inreased. Keywords: Pith number, Helial oil heat exhanger, Overall Heat Transfer. 1. Introdution Heat exhanger is the devie that helps to transfer heat from the hot body to old body. There are many types of the heat exhanger available based upon the TEMA. There is some rare type of the heat hanger available like double pass and tube in tube helial oil heat exhanger, whih omes to tubular type of heat exhanger. The tube in tube helial oil type of heat exhanger offers a wide option for the design in whih liquid to liquid heat transfer an be inorporated along with the refrigerant to liquid and implementation of Nano fluids an be applied. The steep urvature s in the tubes introdues the seondary flow that is normal to the primary flow, whih leads to form the transitionflow, with the turbulent onditions inreases the heat transfer.assuh, number of turns, whih is responsible for the inrease in the urvatures that indued in inrease in the Dean Number, whih is assoiated by the heat transfer with the urvature s, with inrease in the Dean Number the inrease in the Turbulene is aused by urvature whih is diretly depended on the pith of the helial oil. Whih is modeled as the k-e model, So any flutuations in the pith index will show immense effet on the Overall heat exhange value. The implementation s and usage of double pipe helial tube heat exhangers is in the reovery of CO 2, ooling the hydroarbons and in polymer industries for ooling, sine they are ompat in nature they an be used in the spae limitation plaes like spae and steam generation and marine and industrial appliation. Extensive usage of this type of exhangers are used in low temperature ryogeni researh. 2. Literature Review The experimental omparison between tube in tube and helial oil heat exhangers have been made by the Ruhal G.Humbare,Suraj R.Gurav et al 2015[1]. The analysis of helial oil heat exhanger is done by Amol Andhare and V.M Kriplani et al 2014 [2] orrelations were proposed to alulate shell side and tube side heat transfer oeffiients for different urvature ratios and pith ratios. Wale l.a.aly et al 2014[3]has performed CFD study to investigate the 3-D turbulene flow and heat transfer of oiled tube in tube heat exhangers results shown that Gnielinski orrelation was used extensively for prediting nusselt number as the funtion of prandtl number and the onvetive o-effiients in inner oil tube and annular oil tube. J.S Jaykumar S.M Mahajani et al 2008[4] have performed CFD simulations for vertial and horizontal oriented 1
2 helial oils by varying pith irle diameter and tube pith and pipe diameter and study the influene on heat transfer by varying this parameter a orrelation was presented to predit the loal values of nussult number as the funtion of angular loation of the point. Timothy J.Rennie et al 2006[5]has performed the experimental study on the tube in tube helial oil heat exhanger by varying flow rates within the turbulent region in inner tube and in the annulus results have shown that the experimental data fit well with the numerial values for larger heat exhangers but some differenes between numerial and experimental data for smaller oil. 3. Methodology From the overall heat transfer rate, it is proven that the area is the possible terms in adjusting the parameter where the pith ome into play a possible hange. To prove the pith is the possible parameter for the heat transfer rate the following derivation has been made. The following are the notation taken for the derivation L is the length of the helial oil. =1.5 m N is the number of turns of the oil. R is the base radius if the helial oil. =0.15m p is the pith of the helial oil. Q avg is the average heat transfer rate. U is the overall heat transfer rate. d o-i is the annulus thikness. t is the orreted log mean temperature differene. A Q = U t Qavg U = A t Q Eq. (2) Eq. (3) avg U = Eq. (4) U π d L t o i Q avg = Eq. (5) 2 2 π do i N (2 π R) + p t 1 U = f p Eq. (6) 1 Uα Eq. (7) p From the eq 7 it is proved that the hange in the heat transfer rate has the effet by the hange in the pith if the spiral. For inrease in the heat transfer take plae for derease in the pith and for the pith it annot be zero and annot be equal to length of the helial oil. Sine the study was not on the overall design of the tube in tube helial oil heat exhanger but speified to the pith of it so the numerial simulation was made by varying the pith in two ases by 0.09m and 0.20 m. the type of flow made was ounter flow type. In order to verify the above equation numerial simulation was made on the Anysys Fluent tool where the solver used was k-ε type and with the turbulent intensity of 5% and Hydrauli length as 10mwith boundary onditions of fluid as follows. Figure 1. The design nomenlature of the Double pipe helial oil heat exhanger π 2 2 L = N (2 R) + p Eq. (1) 2
3 Figure 2. boundary onditions of the numerial simulation of the double pipe helial heat exhanger outlet and C is the hot waterinlet and D is the hot water outlet. Figure 5.showing the outlet and inlet temperatures of the tube in tube helial oil heat exhangers of Figure 3. the different mesh modelsof tube in tube helial oil heat exhangers A is of pith m B is of pith 0.07 m C is of pith 0.09m. The mesh that was generated within ANSYS and automati mesh with the refinement of 2 at the inlet and outlets faes and by making sure that the mesh has aptured the steepurvature of the geometry. The type of assembly method was ut ell method and an inflation layers are of 5 is added in order to aount the heat transfer in at the wall. pith 0.07 A is old water inlet B is the old water outlet and C is the hot water inlet and D is the hot water outlet 4. Results The Computational results that has been observed after the solution is made to onverged pith 0.09 A is old water inlet B is the old water outlet and C is the hot water inlet and D is the hot water outlet. Figure 7. showing the various heat transfer Initializationand propagation in tube in tube helial oil heat exhangers Figure 4. showing the outlet and inlet temperatures of the tube in tube helial oil heat ex-hangers of pith 0.09 A is old water inlet B is the old water 3
4 It is noted form the figures 4,5,6 of B images the inner layers of the old outlet have shown the derease of temperature layers and has given maximum derease in the pith of 0.045m tube double pipe helial oil heat exhanger. Form the above figure7 it is observed that the derease in the pith has shown that heat transfer rate has started in advane for the outlet pipe than that of greater pith. Results show that pith of helial oil heat exhanger has a greater effet on the over- all heat transfer oeffiient so the effet of Pith on the overall heat transfer oeffiients. The following are the equation taken for the alulation of the overall heat transfer oeffiients. Q = m& ( T T ) Eq. (8) old i o Q = m& ( T T ) Eq. (9) Q hot h h hi ho avg Qold + Qhot = Eq. (10) Aannular = π dout in N (2 π R) + p Eq. (11) ( Thi To ) ( Thi Ti ) LMTD = Eq. (12) ( Thi To ) ln ( Thi Ti ) U Qavg = Eq. (13) A LMTD t annular Corretion fator of the ounter flow is 0.9. From the equation (11) and from equation (13) the overall heat transfer rate is given in the equation (13) so equation (7) argues best with equation (13) hene provide an proof of justifiation of problem statement 4. Conlusion The graph is fitted to a ubi equation for the approximation equation in terms of terms of pith of the helial oil heat exhanger and the overall heat transfer rate of the heat exhanger. Figure 8. showing the graph of the pith variation and over all heat transfer oeffiient of tube in tube helial oil heat exhanger U = p p Eq.(14) It is observed form the above equation if the pith equals to the length of the helial oil there is no heat transfer and above orrelation is to used only within the range of m to 0.09 m of the pith. With respetive to the simulation results from the figure 4 of B it is observed that the heating gradient along the fae has no proper formation and from the figure 5 of B the generation of the heat gradient form the annulus fae has visual hange with the area showing the least default value as 27 0 C and for the next 6 of B also show an higher heating gradient.this numerial results prove that the with inrease in the pith there is an notieable hange in heat exhanging pattern in the working media. With respetive to the figure 8 it is observed that the ooling url of the outer tube also shows the proportional pattern as the variation of pith where inrease in the pith the length of the ooling url of the hot fluid has given an onlusion the inorporating the lower pith helps in the ooling of the hot fluid well in advane rather than the just ooling in that instant this intern helps in the reservoir mehanism of ooling and even helps in designing the ompat heat exhangers. It is proved from the numerial analysis pith shows the parametri hange in the number of turns where there is hange in the dean number of the geometry, whih effeted the overall heat transfer oeffiient. While designing the tube in tube helial oil heat exhanger the pith of it should be in relation that have values proved from the study rather than designing with relation to the radius of the helial oil. Referenes [1]Amol Andhat and V.M Kriplani 2014 Thermal Analysis of a Helial Coil Heat Exhanger International Journal of Innovative Researh in Advaned Engineering (IJIRAE) Volume 1 Pg No [2]Aly, Wael IA "Computational Fluid Dynamis and Optimization of Flow and Heat Transfer in Coiled Tube-in-Tube Heat Exhangers Under Turbulent Flow Conditions." Journal of 4
5 Thermal Siene and Engineering Appliations 6.3 Volume 79 Pg No [3] A.P. Vetrivel, S.Senthilkumaren, G. Sakthinathan, R.Anandhan, Review for The Heat Transfer Enhanement of Heat Exhanger Using Nanofluids, Volume 1 Pg No [4]Jayakumar, J. S "Experimental and CFD estimation of heat transfer in helially oiled heat exhangers."chemial engineering researh and Design 86,Pg No [5]Rennie, Timothy J., and Vijaya GS Raghavan Numerial studies of a double-pipe helial heat exhanger." Applied Thermal Engineering Pg No [6]Ruhal G.Humbare, Suraj R.Gurav Analysis of Heat Transfer Enhanement in Tubein-tube Helial Coil Heat Exhangers International Journal of Advaned Engineering and Tehnology.5.1 Volume 1 Pg No
6 6
Heat exchangers: Heat exchanger types:
Heat exhangers: he proess of heat exhange between two fluids that are at different temperatures and separated by a solid wall ours in many engineering appliations. he devie used to implement this exhange
More informationReview for Exam #2. Specific Heat, Thermal Conductivity, and Thermal Diffusivity. Conduction
Review for Exam # Speifi Heat, Thermal Condutivity, and Thermal Diffusivity Speifi heat ( p ) A measure of how muh energy is required to raise the temperature of an objet Thermal ondutivity (k) A measure
More informationNatural Convection Experiment Measurements from a Vertical Surface
OBJECTIVE Natural Convetion Experiment Measurements from a Vertial Surfae 1. To demonstrate te basi priniples of natural onvetion eat transfer inluding determination of te onvetive eat transfer oeffiient.
More informationNumerical Analysis of a Helical Coiled Heat Exchanger using CFD
International Journal of Thermal Technologies ISSN 2277-4114 213 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijtt Research Article Numerical Analysis of a Helical Coiled
More informationOptimal control of solar energy systems
Optimal ontrol of solar energy systems Viorel Badesu Candida Oanea Institute Polytehni University of Buharest Contents. Optimal operation - systems with water storage tanks 2. Sizing solar olletors 3.
More informationCOMBINED PROBE FOR MACH NUMBER, TEMPERATURE AND INCIDENCE INDICATION
4 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES COMBINED PROBE FOR MACH NUMBER, TEMPERATURE AND INCIDENCE INDICATION Jiri Nozika*, Josef Adame*, Daniel Hanus** *Department of Fluid Dynamis and
More informationWave Propagation through Random Media
Chapter 3. Wave Propagation through Random Media 3. Charateristis of Wave Behavior Sound propagation through random media is the entral part of this investigation. This hapter presents a frame of referene
More informationDetermination of the Aerodynamic Characteristics of Flying Vehicles Using Method Large Eddy Simulation with Software ANSYS
Automation, Control and Intelligent Systems 15; 3(6): 118-13 Published online Deember, 15 (http://www.sienepublishinggroup.om//ais) doi: 1.11648/.ais.1536.14 ISSN: 38-5583 (Print); ISSN: 38-5591 (Online)
More informationBINARY RANKINE CYCLE OPTIMIZATION Golub, M., Koscak-Kolin, S., Kurevija, T.
BINARY RANKINE CYCLE OPTIMIZATION Golub, M., Kosak-Kolin, S., Kurevija, T. Faulty of Mining, Geology and Petroleum Engineering Department of Petroleum Engineering Pierottijeva 6, Zagreb 0 000, Croatia
More informationStudy the Effect of Variable Viscosity and Thermal Conductivity of Micropolar Fluid in a Porous Channel
Study the Effet of Variable Visosity and Thermal Condutivity of Miropolar Fluid in a Porous Channel Gitima Patowary 1, Dusmanta Kumar Sut 1 Assistant Professor, Dept. of Mathematis, Barama College, Barama,
More information23.1 Tuning controllers, in the large view Quoting from Section 16.7:
Lesson 23. Tuning a real ontroller - modeling, proess identifiation, fine tuning 23.0 Context We have learned to view proesses as dynami systems, taking are to identify their input, intermediate, and output
More informationStudy on the leak test technology of spacecraft using ultrasonic
SINCE2013 Singapore International NDT Conferene & Exhibition 2013, 19-20 July 2013 Study on the test tehnology of spaeraft using ultrasoni Yan Rongxin, Li Weidan Beijing Institute of Spaeraft Environment
More informationEffect of Different Types of Promoters on Bed Expansion in a Gas-Solid Fluidized Bed with Varying Distributor Open Areas
Journal of Chemial Engineering of Japan, Vol. 35, No. 7, pp. 681 686, 2002 Short Communiation Effet of Different Types of Promoters on Bed Expansion in a Gas-Solid Fluidized Bed with Varying Distributor
More informationNUMERICAL SIMULATION OF ATOMIZATION WITH ADAPTIVE JET REFINEMENT
Paper ID ILASS8--7 ILASS 28 Sep. 8-, 28, Como Lake, Italy A44 NUMERICAL SIMULATION OF ATOMIZATION WITH ADAPTIVE JET REFINEMENT Anne Bagué, Daniel Fuster, Stéphane Popinet + & Stéphane Zaleski Université
More informationAvailable online at ScienceDirect. Energy Procedia 54 (2014 )
Available online at www.sienediret.om SieneDiret Energy Proedia 54 (214 ) 796 83 4th International Conferene on Advanes in Energy Researh 213, ICAER 213 Stage holdup of dispersed phase in dis & doughnut
More informationSTUDY OF INTERFACIAL BEHAVIOR OF CNT/POLYMER COMPOSITE BY CFE METHOD
THE 19TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS STUDY OF INTERFACIAL BEHAVIOR OF CNT/POLYMER COMPOSITE BY CFE METHOD Q. S. Yang*, X. Liu, L. D. Su Department of Engineering Mehanis, Beijing University
More informationSTUDY OF INHERENT FREQUENCY OF HELMHOLTZ RESONATOR
005 WJTA Amerian Waterjet Conferene August -3, 005! Houston, Texas Paper 6B-4 STUDY OF INHERENT FREQUENCY OF HELMHOLT RESONATOR Gong Weili An Liqian Cui Longlian Xie Guixin Shool of Mehanis, Arhiteture
More informationMATHEMATICAL AND NUMERICAL BASIS OF BINARY ALLOY SOLIDIFICATION MODELS WITH SUBSTITUTE THERMAL CAPACITY. PART II
Journal of Applied Mathematis and Computational Mehanis 2014, 13(2), 141-147 MATHEMATICA AND NUMERICA BAI OF BINARY AOY OIDIFICATION MODE WITH UBTITUTE THERMA CAPACITY. PART II Ewa Węgrzyn-krzypzak 1,
More informationChemical Engineering Thermodynamics II ( ) 02 - The Molar Gibbs Free Energy & Fugacity of a Pure Component
Chemial Engineering Thermodynamis II (090533) 0 - The Molar Gibbs Free Energy & Fugaity of a ure Component Dr. Ali Khalaf Al-matar Chemial Engineering Department University of Jordan banihaniali@yahoo.om
More informationThe gravitational phenomena without the curved spacetime
The gravitational phenomena without the urved spaetime Mirosław J. Kubiak Abstrat: In this paper was presented a desription of the gravitational phenomena in the new medium, different than the urved spaetime,
More informationMillennium Relativity Acceleration Composition. The Relativistic Relationship between Acceleration and Uniform Motion
Millennium Relativity Aeleration Composition he Relativisti Relationship between Aeleration and niform Motion Copyright 003 Joseph A. Rybzyk Abstrat he relativisti priniples developed throughout the six
More informationTHERMODYNAMICS Lecture 15: Heat exchangers
HERMODYNAMICS Leture 5: Heat exangers Pierwsza strona Introdution to Heat Exangers Wat Are Heat Exangers? Heat exangers are units designed to transfer eat from a ot flowing stream to a old flowing stream
More information3 Tidal systems modelling: ASMITA model
3 Tidal systems modelling: ASMITA model 3.1 Introdution For many pratial appliations, simulation and predition of oastal behaviour (morphologial development of shorefae, beahes and dunes) at a ertain level
More informationCALCULATION OF THE HEAT TRANSFER AND TEMPERATURE ON THE AIRCRAFT ANTI-ICING SURFACE
7 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES CALCULATION OF THE HEAT TRANSFER AND TEMPERATURE ON THE AIRCRAFT ANTI-ICING SURFACE W. Dong, J. J. Zhu, X. H. Min Shool of Mehanial Engineering,
More informationMTH 142 Solution Practice for Exam 2
MTH 4 Solution Pratie for Eam Updated /7/4, 8: a.m.. (a) = 4/, hene MID() = ( + + ) +/ +6/ +/ ( 4 ) =. ( LEFT = ( 4..). =.7 and RIGHT = (.. ). =.7. Hene TRAP =.7.. (a) MID = (.49 +.48 +.9 +.98). = 4.96.
More informationHeat Transfer Analysis of a Helical Coil Heat Exchanger by using CFD Analysis
International Journal of Computational Science, Mathematics and Engineering Volume. 3, Issue. 5, 2016 ISSN-2349-8439 Heat Transfer Analysis of a Helical Coil Heat Exchanger by using CFD Analysis Dr. B.Jayachandraiah
More informationThe Impact of Roof Pitch and Ceiling Insulation on Cooling Load of Naturally-Ventilated Attics
University of Nebraska - Linoln DigitalCommons@University of Nebraska - Linoln Arhitetural Engineering -- Faulty Publiations Arhitetural Engineering and Constrution, Durham Shool of 2012 The Impat of Roof
More informationAnalysis of Leakage Paths Induced by Longitudinal Differential Settlement of the Shield-driven Tunneling
2016 rd International Conferene on Engineering Tehnology and Appliation (ICETA 2016) ISBN: 978-1-60595-8-0 Analysis of Leakage Paths Indued by Longitudinal Differential Settlement of the Shield-driven
More informationMultiPhysics Analysis of Trapped Field in Multi-Layer YBCO Plates
Exerpt from the Proeedings of the COMSOL Conferene 9 Boston MultiPhysis Analysis of Trapped Field in Multi-Layer YBCO Plates Philippe. Masson Advaned Magnet Lab *7 Main Street, Bldg. #4, Palm Bay, Fl-95,
More informationSubject: Introduction to Component Matching and Off-Design Operation % % ( (1) R T % (
16.50 Leture 0 Subjet: Introdution to Component Mathing and Off-Design Operation At this point it is well to reflet on whih of the many parameters we have introdued (like M, τ, τ t, ϑ t, f, et.) are free
More informationA Heuristic Approach for Design and Calculation of Pressure Distribution over Naca 4 Digit Airfoil
IOSR Journal of Engineering (IOSRJEN) ISSN (e): 2250-3021, ISSN (p): 2278-8719 PP 11-15 www.iosrjen.org A Heuristi Approah for Design and Calulation of Pressure Distribution over Naa 4 Digit Airfoil G.
More informationMICROSCALE SIMULATIONS OF CONDUCTIVE / RADIATIVE HEAT TRANSFERS IN POROUS MEDIA
MICROCALE IMULAION OF CONDUCIVE / RADIAIVE HEA RANFER IN POROU MEDIA J.-F. hovert, V.V. Mourzenko, C. Roudani Institut PPRIME-CNR Context, motivation moldering in porous media 400K (measured) Mirosale
More informationSOME FUNDAMENTAL ASPECTS OF COMPRESSIBLE FLOW
SOE FUNDAENAL ASECS OF CORESSIBLE FLOW ah number gas veloity mah number, speed of sound a a R < : subsoni : transoni > : supersoni >> : hypersoni art three : ah Number 7 Isentropi flow in a streamtube
More informationEffects of Vane Sweep on Fan-Wake/Outlet-Guide-Vane Interaction Broadband Noise
Effets of Vane Sweep on Fan-Wake/Outlet-Guide-Vane Interation Broadband Noise Hongbin Ju* GE Global Researh Center, One Researh Cirle, Niskayuna, NY. 09 A method is developed for prediting broadband noise
More informationA Stochastic Analysis of Liquid Mixing in Bubble Column
Amerian Journal of Fluid Dynamis 013, 3(3): 75-79 DOI: 193/j.ajfd.0130303.04 A Stohasti Analysis of Liquid Mixing in Bubble Column Rajeev Parmar, Subrata Kumar Majumder * Department of Chemial Engineering,
More information10.2 The Occurrence of Critical Flow; Controls
10. The Ourrene of Critial Flow; Controls In addition to the type of problem in whih both q and E are initially presribed; there is a problem whih is of pratial interest: Given a value of q, what fators
More informationEvaluation of effect of blade internal modes on sensitivity of Advanced LIGO
Evaluation of effet of blade internal modes on sensitivity of Advaned LIGO T0074-00-R Norna A Robertson 5 th Otober 00. Introdution The urrent model used to estimate the isolation ahieved by the quadruple
More informationmaterials ISSN
Materials 2013, 6, 551-564; doi:10.3390/ma6020551 Artile OPEN ACCESS materials ISSN 1996-1944 www.mdpi.om/journal/materials Theoretial Researh on Thermal Shok Resistane of Ultra-High Temperature Ceramis
More informationImprovements in the Modeling of the Self-ignition of Tetrafluoroethylene
Exerpt from the Proeedings of the OMSOL onferene 010 Paris Improvements in the Modeling of the Self-ignition of Tetrafluoroethylene M. Bekmann-Kluge 1 *,. errero 1, V. Shröder 1, A. Aikalin and J. Steinbah
More informationThree-dimensional morphological modelling in Delft3D-FLOW
Three-dimensional morphologial modelling in Delft3D-FLOW G. R. Lesser, J. van Kester, D.J.R. Walstra and J.A. Roelvink WL delft hydraulis email: giles.lesser@ldelft.nl Abstrat Computer modelling of sediment
More informationLecture 3 Heat Exchangers
L3 Leture 3 Heat Exangers Heat Exangers. Heat Exangers Transfer eat from one fluid to anoter. Want to imise neessary ardware. Examples: boilers, ondensors, ar radiator, air-onditioning oils, uman body.
More informationExperimental study with analytical validation of thermo-hydraulic performance of plate heat exchanger with different chevron angles
Exerimental study with analytial validation of thermo-hydrauli erformane of late heat exhanger with different hevron angles Arunahala U C, Ajay R K and Sandee H M Abstrat The Plate heat exhanger is rominent
More informationEffects of the swirl ratio on the turbulent flow fields of tornadolike vortices by using LES turbulent model
Shanghai, China; September -6, Effets of the swirl ratio on the turbulent flow fields of tornadolike vorties by using LES turbulent model Zhenqing Liu a, Takeshi Ishihara b a Department of Civil Engineering,
More informationCollinear Equilibrium Points in the Relativistic R3BP when the Bigger Primary is a Triaxial Rigid Body Nakone Bello 1,a and Aminu Abubakar Hussain 2,b
International Frontier Siene Letters Submitted: 6-- ISSN: 9-8, Vol., pp -6 Aepted: -- doi:.8/www.sipress.om/ifsl.. Online: --8 SiPress Ltd., Switzerland Collinear Equilibrium Points in the Relativisti
More informationOptimization of Statistical Decisions for Age Replacement Problems via a New Pivotal Quantity Averaging Approach
Amerian Journal of heoretial and Applied tatistis 6; 5(-): -8 Published online January 7, 6 (http://www.sienepublishinggroup.om/j/ajtas) doi:.648/j.ajtas.s.65.4 IN: 36-8999 (Print); IN: 36-96 (Online)
More informationA Differential Equation for Specific Catchment Area
Proeedings of Geomorphometry 2009. Zurih, Sitzerland, 3 ugust - 2 September, 2009 Differential Equation for Speifi Cathment rea J. C. Gallant, M. F. Huthinson 2 CSIRO Land and Water, GPO Box 666, Canberra
More informationChapter 3 Lecture 7. Drag polar 2. Topics. Chapter-3
hapter 3 eture 7 Drag polar Topis 3..3 Summary of lift oeffiient, drag oeffiient, pithing moment oeffiient, entre of pressure and aerodynami entre of an airfoil 3..4 Examples of pressure oeffiient distributions
More informationA simple expression for radial distribution functions of pure fluids and mixtures
A simple expression for radial distribution funtions of pure fluids and mixtures Enrio Matteoli a) Istituto di Chimia Quantistia ed Energetia Moleolare, CNR, Via Risorgimento, 35, 56126 Pisa, Italy G.
More informationEXPERIMENTAL AND NUMERICAL STUDIES OF A SPIRAL PLATE HEAT EXCHANGER
THERMAL SCIENCE: Year 2014, Vol. 18, No. 4, pp. 1355-1360 1355 EXPERIMENTAL AND NUMERICAL STUDIES OF A SPIRAL PLATE HEAT EXCHANGER by Rangasamy RAJAVEL Department of Mechanical Engineering, AMET University,
More informationSlenderness Effects for Concrete Columns in Sway Frame - Moment Magnification Method
Slenderness Effets for Conrete Columns in Sway Frame - Moment Magnifiation Method Slender Conrete Column Design in Sway Frame Buildings Evaluate slenderness effet for olumns in a sway frame multistory
More informationWhat are the locations of excess energy in open channels?
Leture 26 Energy Dissipation Strutures I. Introdution Exess energy should usually be dissipated in suh a way as to avoid erosion in unlined open hannels In this ontext, exess energy means exess water veloity
More informationUNIT 1 OPEN CHANNEL FLOW 2 MARK QUESTIONS AND ANSWERS
DEPARTMENT: CIVIL ENGINEERING SEMESTER: IV- SEMESTER SUBJECT CODE / Name: CE53 / Applied Hydrauli Engineering 1. Define open hannel flow with examples. Examples: UNIT 1 OPEN CHANNEL FLOW MARK QUESTIONS
More informationSlenderness Effects for Concrete Columns in Sway Frame - Moment Magnification Method
Slenderness Effets for Conrete Columns in Sway Frame - Moment Magnifiation Method Slender Conrete Column Design in Sway Frame Buildings Evaluate slenderness effet for olumns in a sway frame multistory
More informationReceived 3 November 2015; accepted 24 December 2015; published 29 December 2015
Open Journal of Fluid Dynamis, 015, 5, 364-379 Published Online Deember 015 in SiRes. http://www.sirp.org/journal/ojfd http://dx.doi.org/10.436/ojfd.015.54036 Effets of Thermal Radiation and Radiation
More informationEvaluation of a Dual-Load Nondestructive Testing System To Better Discriminate Near-Surface Layer Moduli
52 TRANSPORTATION RESEARCH RECORD 1355 Evaluation of a Dual-Load Nondestrutive Testing System To Better Disriminate Near-Surfae Layer Moduli REYNALDO ROQUE, PEDRO ROMERO, AND BYRON E. RUTH Theoretial analyses
More informationA Time-Dependent Model For Predicting The Response Of A Horizontally Loaded Pile Embedded In A Layered Transversely Isotropic Saturated Soil
IOSR Journal of Mehanial and Civil Engineering (IOSR-JMCE) e-issn: 2278-1684,p-ISSN: 232-334X, Volume 16, Issue 2 Ser. I (Mar. - Apr. 219), PP 48-53 www.iosrjournals.org A Time-Dependent Model For Prediting
More informationDocument Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers)
A omparison between ylindrial and ross-shaped magneti vibration isolators : ideal and pratial van Casteren, D.T.E.H.; Paulides, J.J.H.; Lomonova, E. Published in: Arhives of Eletrial Engineering DOI: 10.1515/aee-2015-0044
More informationNumerical Simulating Nonlinear Effects of Ultrasonic Propagation on High-speed Ultrasonic Gas Flow Measurement
Appl. Math. Inf. Si. 7, No. 5, 1963-1967 (2013) 1963 Applied Mathematis & Information Sienes An International Journal http://dx.doi.org/10.12785/amis/070535 Numerial Simulating Nonlinear Effets of Ultrasoni
More informationSURFACE WAVES OF NON-RAYLEIGH TYPE
SURFACE WAVES OF NON-RAYLEIGH TYPE by SERGEY V. KUZNETSOV Institute for Problems in Mehanis Prosp. Vernadskogo, 0, Mosow, 75 Russia e-mail: sv@kuznetsov.msk.ru Abstrat. Existene of surfae waves of non-rayleigh
More informationDeveloping Excel Macros for Solving Heat Diffusion Problems
Session 50 Developing Exel Maros for Solving Heat Diffusion Problems N. N. Sarker and M. A. Ketkar Department of Engineering Tehnology Prairie View A&M University Prairie View, TX 77446 Abstrat This paper
More informationStress triaxiality to evaluate the effective distance in the volumetric approach in fracture mechanics
IOSR Journal of ehanial and Civil Engineering (IOSR-JCE) e-issn: 78-1684,p-ISSN: 30-334X, Volume 11, Issue 6 Ver. IV (Nov- De. 014), PP 1-6 Stress triaxiality to evaluate the effetive distane in the volumetri
More informationFailure Assessment Diagram Analysis of Creep Crack Initiation in 316H Stainless Steel
Failure Assessment Diagram Analysis of Creep Crak Initiation in 316H Stainless Steel C. M. Davies *, N. P. O Dowd, D. W. Dean, K. M. Nikbin, R. A. Ainsworth Department of Mehanial Engineering, Imperial
More informationA Study of Dufour and Soret Effect on MHD Mixed Convection Stagnation Point Flow towards a Vertical Plate in a Porous Medium
International Journal of Fluids Engineering. ISSN 0974-3138 Volume 9, Number 1 (017), pp. 1-8 International Researh Publiation House http://www.irphouse.om A Study of Dufour and Soret Effet on MHD Mixed
More informationSingular Event Detection
Singular Event Detetion Rafael S. Garía Eletrial Engineering University of Puerto Rio at Mayagüez Rafael.Garia@ee.uprm.edu Faulty Mentor: S. Shankar Sastry Researh Supervisor: Jonathan Sprinkle Graduate
More informationAnalysis of discretization in the direct simulation Monte Carlo
PHYSICS OF FLUIDS VOLUME 1, UMBER 1 OCTOBER Analysis of disretization in the diret simulation Monte Carlo iolas G. Hadjionstantinou a) Department of Mehanial Engineering, Massahusetts Institute of Tehnology,
More informationFinite Element Analysis on Pulsed Laser Forming of Sheet Metal
5 th International & 26 th All India Manufaturing Tehnology, Design and Researh Conferene (AIMTDR 214) Deember 12 th 14 th, 214, IIT Guwahati, Assam, India Finite Element Analysis on Pulsed Laser Forming
More informationEXACT TRAVELLING WAVE SOLUTIONS FOR THE GENERALIZED KURAMOTO-SIVASHINSKY EQUATION
Journal of Mathematial Sienes: Advanes and Appliations Volume 3, 05, Pages -3 EXACT TRAVELLING WAVE SOLUTIONS FOR THE GENERALIZED KURAMOTO-SIVASHINSKY EQUATION JIAN YANG, XIAOJUAN LU and SHENGQIANG TANG
More informationRobust Flight Control Design for a Turn Coordination System with Parameter Uncertainties
Amerian Journal of Applied Sienes 4 (7): 496-501, 007 ISSN 1546-939 007 Siene Publiations Robust Flight ontrol Design for a urn oordination System with Parameter Unertainties 1 Ari Legowo and Hiroshi Okubo
More informationA numerical Study on the Acoustic Characteristics of a Centrifugal Impeller with a Splitter
GESTS Int l Trans. Computer Siene and Engr., Vol.2, No.1 17 A numerial Study on the Aousti Charateristis of a Centrifugal Impeller with a Splitter Wan-Ho Jeon 1 1 Tehnial Researh Lab., CEDIC Ltd., #113,
More informationIN-PLANE VIBRATIONS OF CURVED BEAMS WITH VARIABLE CROSS-SECTIONS CARRYING ADDITIONAL MASS
11 th International Conferene on Vibration Problems Z. Dimitrovová et al. (eds.) Lisbon, Portugal, 9-1 September 013 IN-PLANE VIBRATIONS OF CURVED BEAMS WITH VARIABLE CROSS-SECTIONS CARRYING ADDITIONAL
More informationHeat propagation and stability in a small high T superconductor. coil
Ž. Physia C 310 1998 372 376 Heat propagation and stability in a small high T superondutor oil T. Kiss a,), V.S. Vysotsky a, H. Yuge a, H. Saho a, Yu.A. Ilyin a, M. Takeo a, K. Watanabe b, F. Irie a Graduate
More informationCompartment Mixing Model in a Stirred Tank Equipped Dual Rushton Turbine
Iranian Journal of Chemial Engineering Vol. 9, No. (Summer), 01, IAChE Compartment Mixing Model in a Stirred Tank Equipped Dual Rushton Turbine F. Fakheri, J. Moghaddas Transport Phenomena Researh Center,
More informationDamage Evaluation of Core Concrete by AE
www.rl.issres.net Vol. 2 (3) Sep. 2011 Damage valuation of Core Conrete by A Tetsuya Suzuki 1 and Masayasu Ohtsu 2 1 Faulty of Agriulture Niigata University, JAPAN 2 Graduate Shool of Siene and Tehnology
More informationEVALUATION OF THERMAL PERFORMANCE OF CONE SHAPED HELICAL COIL HEAT EXCHANGER BY USING CFD ANALYSIS
EVALUATION OF THERMAL PERFORMANCE OF CONE SHAPED HELICAL COIL HEAT EXCHANGER BY USING CFD ANALYSIS DR. B. JAYACHANDRAIAH Prof of M.E & Vice-Principal Sri Kalahasteeswara Institute of Technology (S.K.I.T),
More informationKeywords: Spiral plate heat exchanger, Heat transfer, Nusselt number
EXPERIMENTAL AND NUMERICAL STUDIES OF A SPIRAL PLATE HEAT EXCHANGER Dr.RAJAVEL RANGASAMY Professor and Head, Department of Mechanical Engineering Velammal Engineering College,Chennai -66,India Email:rajavelmech@gmail.com
More informationControl Theory association of mathematics and engineering
Control Theory assoiation of mathematis and engineering Wojieh Mitkowski Krzysztof Oprzedkiewiz Department of Automatis AGH Univ. of Siene & Tehnology, Craow, Poland, Abstrat In this paper a methodology
More informationIMPACT MODELLING OF THE COEFFICIENT OF RESTITUTION OF POTATOES BASED ON THE KELVIN- VOIGHT PAIR
Bulletin of the Transilvania University of Braşov Series II: Forestry Wood Industry Agriultural Food Engineering Vol. 9 (58) No. - 06 IMPACT MODELLING OF THE COEFFICIENT OF RESTITUTION OF POTATOES BASED
More informationDynamic Simulation and Composition Control in A 10 L Mixing Tank
roeeding of International Conferene on Chemial and Material Engineering ISBN : 978--97-8-7 SE.4 - Dynami Simulation and Composition Control in A L Mixing Tank Yulius Deddy Hermawan Chemial Engineering
More informationSEDIMENT TRANSPORT CALCULATION CONSIDERING COHESIVE EFFECTS AND ITS APPLICATION TO WAVE-INDUCED TOPOGRAPHIC CHANGE
Proeedings of the 7 th International Conferene on Asian and Paifi Coasts (APAC 03) Bali, Indonesia, September 4-6, 03 SEDIMENT TRANSPORT CALCULATION CONSIDERING COHESIVE EFFECTS AND ITS APPLICATION TO
More informationLOAD-RATIO DEPENDENCE ON FATIGUE LIFE OF COMPOSITES
LOAD-RATIO DEPENDENCE ON FATIGUE LIFE OF COMPOSITES Joakim Shön 1 and Anders F. Blom 1, 1 Strutures Department, The Aeronautial Researh Institute of Sweden Box 1101, SE-161 11 Bromma, Sweden Department
More informationNumerical Tests of Nucleation Theories for the Ising Models. Abstract
to be submitted to Physial Review E Numerial Tests of Nuleation Theories for the Ising Models Seunghwa Ryu 1 and Wei Cai 2 1 Department of Physis, Stanford University, Stanford, California 94305 2 Department
More informationDynamic analysis of the mechanical seals of the rotor of the labyrinth screw pump
IOP Conferene Series: Materials Siene and Engineering PAPER OPEN ACCESS Dynami analysis of the mehanial seals of the rotor of the labyrinth srew pump To ite this artile: A Y Lebedev et al 17 IOP Conf.
More informationDesign, Fabrication and Testing Of Helical Tube in Tube Coil Heat Exchanger
International Journal of Engineering and Technical Research (IJETR) ISSN: 2321-0869, Volume-2, Issue-12, December 2014 Design, Fabrication and Testing Of Helical Tube in Tube Coil Heat Exchanger Sagar
More informationSurging in Coil Springs
Purdue University Purdue e-pubs nternational Compressor Engineering Conferene Shool of Mehanial Engineering 1996 Surging in Coil Springs R. A. Simmons Purdue University W. Soedel Purdue University Follow
More informationStudy of EM waves in Periodic Structures (mathematical details)
Study of EM waves in Periodi Strutures (mathematial details) Massahusetts Institute of Tehnology 6.635 partial leture notes 1 Introdution: periodi media nomenlature 1. The spae domain is defined by a basis,(a
More informationDevelopment of Fuzzy Extreme Value Theory. Populations
Applied Mathematial Sienes, Vol. 6, 0, no. 7, 58 5834 Development of Fuzzy Extreme Value Theory Control Charts Using α -uts for Sewed Populations Rungsarit Intaramo Department of Mathematis, Faulty of
More informationWuming Li and Fan Yang
NEW ZEALAND JOURNAL OF MATHEMATICS Volume 33 (004), 159 164 N DIMENSIONAL MINKOWSKI SPACE AND SPACE TIME ALGEBRA Wuming Li and Fan Yang (Reeived February 003) Abstrat. By using an n Dimensional Minkowski
More informationQCLAS Sensor for Purity Monitoring in Medical Gas Supply Lines
DOI.56/sensoren6/P3. QLAS Sensor for Purity Monitoring in Medial Gas Supply Lines Henrik Zimmermann, Mathias Wiese, Alessandro Ragnoni neoplas ontrol GmbH, Walther-Rathenau-Str. 49a, 7489 Greifswald, Germany
More informationNOTICE: this is the author s version of a work that was accepted for publication in Journal of Petroleum Science and Engineering Changes resulting
NOTICE: this is the author s version of a work that was aepted for publiation in Journal of Petroleum Siene and Engineering Changes resulting from the publishing proess, suh as peer review, editing, orretions,
More informationNuclear Shell Structure Evolution Theory
Nulear Shell Struture Evolution Theory Zhengda Wang (1) Xiaobin Wang () Xiaodong Zhang () Xiaohun Wang () (1) Institute of Modern physis Chinese Aademy of SienesLan Zhou P. R. China 70000 () Seagate Tehnology
More informationSpeed-feedback Direct-drive Control of a Low-speed Transverse Flux-type Motor with Large Number of Poles for Ship Propulsion
Speed-feedbak Diret-drive Control of a Low-speed Transverse Flux-type Motor with Large Number of Poles for Ship Propulsion Y. Yamamoto, T. Nakamura 2, Y. Takada, T. Koseki, Y. Aoyama 3, and Y. Iwaji 3
More informationSupplementary Information. Infrared Transparent Visible Opaque Fabrics (ITVOF) for Personal Cooling
Supplementary Information Infrared Transparent Visible Opaque Fabris (ITVOF) for Personal Cooling Jonathan K. Tong 1,Ɨ, Xiaopeng Huang 1,Ɨ, Svetlana V. Boriskina 1, James Loomis 1, Yanfei Xu 1, and Gang
More informationA Spatiotemporal Approach to Passive Sound Source Localization
A Spatiotemporal Approah Passive Sound Soure Loalization Pasi Pertilä, Mikko Parviainen, Teemu Korhonen and Ari Visa Institute of Signal Proessing Tampere University of Tehnology, P.O.Box 553, FIN-330,
More informationPart G-4: Sample Exams
Part G-4: Sample Exams 1 Cairo University M.S.: Eletronis Cooling Faulty of Engineering Final Exam (Sample 1) Mehanial Power Engineering Dept. Time allowed 2 Hours Solve as muh as you an. 1. A heat sink
More informationDIGITAL DISTANCE RELAYING SCHEME FOR PARALLEL TRANSMISSION LINES DURING INTER-CIRCUIT FAULTS
CHAPTER 4 DIGITAL DISTANCE RELAYING SCHEME FOR PARALLEL TRANSMISSION LINES DURING INTER-CIRCUIT FAULTS 4.1 INTRODUCTION Around the world, environmental and ost onsiousness are foring utilities to install
More informationCONVECTION AT A.MODEL ICE EDGE
JACK CALMAN CONVECTION AT A.MODEL ICE EDGE The flow pattern near the edge of a melting ie blok is modeled by heating a metal edge in a saltstratified fluid. An unexpetedly strong, horizontal boundary urrent
More informationDevelopment of the Numerical Schemes and Iteration Procedures Nielsen, Peter Vilhelm
Aalborg Universitet Development of the Numerial Shemes and Iteration Proedures Nielsen, Peter Vilhelm Published in: Euroaademy on Ventilation and Indoor Climate Publiation date: 2008 Doument Version Publisher's
More informationNumerical Analysis of Helical Coil Heat Exchanger in the Light of Waste Heat Recovery Applications
Numerical Analysis of Helical Coil Heat Exchanger in the Light of Waste Heat Recovery Applications Mukesh Sharma 1, Jagdeesh Saini 2 1 M-Tech Student, 2 Assistant Professor B M College of Technology, Indore,
More informationImproving the worthiness of the Elder problem as a benchmark for buoyancy driven convection models
Improving the worthiness of the Elder problem as a benhmark for buoyany driven onvetion models Maarten van Reeuwijk, Simon A. Mathias The Department of Civil and Environmental Engineering Imperial College
More informationExtending LMR for anisotropic unconventional reservoirs
Extending LMR for anisotropi unonventional reservoirs Maro A. Perez Apahe Canada Ltd Summary It has beome inreasingly advantageous to haraterize rok in unonventional reservoirs within an anisotropi framework.
More information