slow velocity fast velocity
|
|
- Miles Phillips
- 6 years ago
- Views:
Transcription
1 Hydrodynamic disersion Disersive transort of contaminants results from the heterogeneous distribution of water flow velocities within and between different soil ores (Figure 1, left). Disersion can be derived from Newton s law of viscosity which states that velocities within a single caillary tube follow a arabolic distribution, with the largest velocity in the middle of the ore and zero velocities at the walls (Figure 1, left). For this reason contaminants in the middle of a ore will travel faster than contaminants that are farther from the center. Since the distribution of contaminant ions within a ore deends on their charge, as well as on the charge of ore walls, some contaminants may move considerably faster than others. In some circumstances (e.g., in fine-tetured soils), anion eclusion may occur. Since the anions in such soils are located redominantly in the faster moving liquid in the center of a ore away from the negatively charge solid surface, anionic contaminants may travel faster than the average velocity of water (e.g., Nielsen et al. 1986). Based on Poiseuille s law, one can further show that velocities in a caillary tube deend strongly on the radius of the tube, and that the average velocity increases with the radius to the second ower. Since soils consist of ores of many different diameters, contaminant flues in ores of different diameters will be significantly different, with some contaminants again traveling faster than others (Figure 1, right). Furthermore, contaminants may travel according to athways of different length. All these factors result in a bell-shaed distribution of velocities and thus of arrival times, tyical of a breakthrough curve. slow velocity fast velocity short athway long athway Figure 1: Distribution of velocities in a single ore (left) and distribution of velocities in a ore system (right) resulting in different arrival times of contaminants (modified from Šimůnek and van Genuchten, 006). he above ore-scale disersion rocesses lead to an overall (macroscoic) hydrodynamic disersion rocess that can be described mathematically in aroimately the same way as molecular diffusion using Fick s first law. Addition of the disersion and diffusion rocesses leads to the following eression for the contaminant mass flu in the liquid hase J h : c c Jh Dh ( Dm D) z z (Eq. 1) 1
2 where D h is the hydrodynamic disersion coefficient [ -1 ] that accounts for both molecular diffusion and mechanical disersion (Fetter, 1999), D m is the mechanical disersion coefficient [ -1 ], and D is the liquid hase diffusion coefficient [ -1 ]. he mechanical disersion coefficient in one-dimensional systems has been found to be aroimately roortional to the average ore-water velocity v (= q/) [ -1 ], with the roortionality constant generally referred to as the (longitudinal) disersivity λ (Biggar and Nielsen 1967). he discussion above holds for one-dimensional transort; multi-dimensional alications require the use of a more comlicated disersion tensor involving longitudinal and transverse disersivities (e.g., Bear 197). Disersivity is a transort arameter that is often obtained eerimentally by fitting measured breakthrough curves with analytical solutions of the advection-disersion equation. he disersivity often changes with the distance over which contaminants travel, the so-called disersion-scale effect. Values of the longitudinal disersivity usually range from about 1 cm for relatively short, acked laboratory columns, to about 5 or 10 cm for field soils. ongitudinal disersivities can be significantly larger (u to hundreds of meters) for regional groundwater transort roblems (Gelhar et al. 1985). If no other information is available, a good first aroimation is to use a value of one-tenth of the transort distance for the longitudinal disersivity (e.g, Anderson 1984), and a value of one-hundred of the transort distance for the transverse disersivity when multi-dimensional alications are considered. In many cases, esecially in groundwater sediments, flow is three-dimensional. In such case, a three-dimensional flow and transort equation should be used. Often, such flow systems can be simlified to a two-dimensional system. For a two-dimensional flow system, the advection-disersion equation for a sorbing chemical element undergoing radioactive decay is written as (Bear, 197): C C C R D ij qi / ne R µc t i j (Eq. 3) i where D ij is the hydrodynamic disersion tensor, q i is the i-th comonent of the Darcy flu, and i (i = 1,) is satial coordinate. he hydrodynamic disersion D ij now accounts for disersion in the direction of the main flow comonent, characterized by the longitudinal ( ) disersivity, and in the direction orthogonal to the main flow direction, characterized by the transversal ( ) disersivity, and is given by (Frind en Hokkanen, 1985): D D 11 v1 / v v / v D (Eq. 4) v1 / v v / v D (Eq. 5) D1 D1 ( ) v1 v / v (Eq. 6) where <v> = (v 1 + v ) 0.5. Usually the transverse disersivity is 10 to 0 times smaller than the longitudinal disersivity. he effect of different ratios for / is seen in Figure. As the ratio becomes smaller, the lume will develo a less elongated shae, indicating that more chemicals will move in the direction orthogonal to the main water flow direction. his henomenon is tyical for layered sediments.
3 Flow d irec tion / = 0 / = 5 / = / = 1 Figure Effect of horizontal versus transverse disersivity on lume sreading. In case of a uniform two-dimensional velocity field with the direction of flow arallel to the -ais, Eq. (3) is simlified to (with v = v = 0): 3
4 R C t D C D C y q C / ne i R µc (Eq. 7) where D and D are the longitudinal and transversal disersion coefficient, resectively, equal to: D D v (Eq. 8) D D v For the determination of aroriate disersivities an etensive literature review was carried out. Details of the review and the data analysis are given by Mallants et al. (1998). Only the main results will be resented here. 1E+003 Neuman, E+00 Ma. ongitudinal disersivity (m) 1E+001 1E+000 1E-001 A = Reliability Min. Intermediate Porous Best estimate Xu & Eckstein, 1995 Fractured High Gelhar et al. [199] 1E-00 Intermediate 1E-003 A = High his study 1E-001 1E+000 1E+001 1E+00 1E+003 1E+004 1E+005 1E+006 Scale (m) Figure 3 ongitudinal disersivity versus scale: only data with high and intermediate reliability are shown. Dashed line indicates best estimate, i.e. = Horizontal arrows indicate maimum (=90m), best estimate ( > 1000 m) = 6.7 m, and minimum ( = 5.5 m) disersivity in the range of travel distances between 1000 and m (from Mallants et al., 1998). A summary of the longitudinal disersivities,, whose reliability was estimated to be intermediate or high, is lotted in Figure 3. Also indicated on the grah are the best estimate 4
5 relationshi = , where is travel distance, together with the 5% and 75% values for /. he best estimate reresents the 50% value of the / robability distribution. Note that these relationshis are only valid for travel distances smaller than 1000 m. For > 1000 m, a constant value of 6.7 m is roosed. Figure 3 clearly shows the increasing trend for with increasing travel distance. However, for travel distances larger than or equal to 1000 m, too few reliable data were available to derive a relationshi between and. We therefore assumed that remained constant with scale for distances larger than 1000 m. he best estimate value was equal to 6.7 m, which is based on the best estimate relationshi / = 0.067, with = 1000 m. his aroach may underestimate at very large distances, but this is conservative. At distances of 1000 m or more, the minimum and maimum value for were equal to the minimum and maimum observed values, resectively. In addition to the longitudinal disersivity, also estimates for the horizontal transverse, H, and the vertical transverse, V, disersivity were derived (in case transort is three dimensional, three disersivities aly,, H, and V, where H accounts for disersion in the y-direction and V in the z-direction). For these two arameters, H and V, best estimates were calculated directly from the relationshi between and H and from the relationshi between H and V, resectively. In other words, each samled value for will lead to a value for H by using H = /5.08 (Mallants et al., 1998). he value for H thus obtained should be within the minimum (= m) and maimum (=1.5m) observed values for H. he calculated value for H will then be used to calculate a value for V, according to V = H /.7. his value should be within the following limits: V m. A summary of the statistical arameters for each of the disersivity coefficients is given in able 1. able 1 Statistical arameters for distributions of, /, H, and V (source: Mallants et al., 1998). [m] / $ [-] ** H [m] *** V [m] 50th ercentile (median) minimum $ # maimum * # log-uniform distribution ( 1000 m); $ log-triangular distribution ( < 1000 m) ** values calculated from H = /5.08; *** values calculated from V = H /.7 #, based on observed values; $ 5th ercentile; * 75th ercentile 5
6 References Anderson, M.P., Movement of contaminants in groundwater: Groundwater transort-advection and disersion In: Groundwater Contamination, Studies in Geohysics, National Academy Press, Washington, DC., Bear, J., Dynamics of Fluids in Porous Media, Elsevier Science, NY., 197. Biggar, J. W., and D. R. Nielsen, Miscible dislacement and leaching henomena, Agronomy, 11, 54-74, Fetter,C.W., Contaminant hydrology. Uer Saddle River; Prentice Hall, Frind, E.O., and Hokkanen, G.E., Simulation of the Borden lume using the alternating direction Galerkin technique. Water Resour. Res., 1(), Gelhar,. W., A. Mantaglou, C. Welty, and K. R. Rehfeldt, A review of Field Scale Physical Solute ransort Processes in Unsaturated and Saturated Porous Media, EPRI oicl Reort EA-4190, Electric Power Research Institute, Palo Alto, CA, Mallants, D., Marivoet, J., and Volckaert, G., Review of recent literature on the disersivity arameter for saturated and fractured orous media. echnical Note 44, Det. W&D, SCK CEN, Mol, Belgium. Nielsen, D. R., van Genuchten, M. h., and Biggar, J. W., Water flow and solute transort rocesses in the unsaturated zone. Water Resour. Res., 18(9), 89S-108S, Šimůnek, J., and M. h. van Genuchten, Contaminant ransort in the Unsaturated Zone: heory and Modeling, Chater in he Handbook of Groundwater Engineering, Ed. Jacques Delleur, Second Edition, CRC Press, ,
A numerical assessment of the random walk particle tracking method for heterogeneous aquifers
288 Calibration and Reliability in Groundwater Modelling: From Uncertainty to Decision Making (Proceedings of ModelCARE 2005, The Hague, The Netherlands, June 2005). IAHS Publ. 304, 2006. A numerical assessment
More informationAnalytical solution and simplified analysis of coupled parent-daughter steady-state transport with multirate mass transfer
WATER RESOURCES RESEARCH, VOL. 49, 635 639, doi:.9/wr8, 3 Analytical solution and simlified analysis of couled arent-daughter steady-state transort with multirate mass transfer Roy Haggerty Received 5
More informationKeywords: pile, liquefaction, lateral spreading, analysis ABSTRACT
Key arameters in seudo-static analysis of iles in liquefying sand Misko Cubrinovski Deartment of Civil Engineering, University of Canterbury, Christchurch 814, New Zealand Keywords: ile, liquefaction,
More informationEffect of geometry on flow structure and pressure drop in pneumatic conveying of solids along horizontal ducts
Journal of Scientific LAÍN & Industrial SOMMERFELD Research: PNEUMATIC CONVEYING OF SOLIDS ALONG HORIZONTAL DUCTS Vol. 70, February 011,. 19-134 19 Effect of geometry on flow structure and ressure dro
More informationInternational Journal of Mathematics Trends and Technology- Volume3 Issue4-2012
Effect of Hall current on Unsteady Flow of a Dusty Conducting Fluid through orous medium between Parallel Porous Plates with Temerature Deendent Viscosity and Thermal Radiation Harshbardhan Singh and Dr.
More informationANALYTICAL MODEL FOR THE BYPASS VALVE IN A LOOP HEAT PIPE
ANALYTICAL MODEL FOR THE BYPASS ALE IN A LOOP HEAT PIPE Michel Seetjens & Camilo Rindt Laboratory for Energy Technology Mechanical Engineering Deartment Eindhoven University of Technology The Netherlands
More informationA Model for Randomly Correlated Deposition
A Model for Randomly Correlated Deosition B. Karadjov and A. Proykova Faculty of Physics, University of Sofia, 5 J. Bourchier Blvd. Sofia-116, Bulgaria ana@hys.uni-sofia.bg Abstract: A simle, discrete,
More informationRADIONUCLIDE DIFFUSION IN GEOLOGICAL MEDIA
GEOPHYSICS RADIONUCLIDE DIFFUSION IN GEOLOGICAL MEDIA C. BUCUR 1, M. OLTEANU 1, M. PAVELESCU 2 1 Institute for Nuclear Research, Pitesti, Romania, crina.bucur@scn.ro 2 Academy of Scientists Bucharest,
More informationModeling Volume Changes in Porous Electrodes
Journal of The Electrochemical Society, 53 A79-A86 2006 003-465/2005/53/A79/8/$20.00 The Electrochemical Society, Inc. Modeling olume Changes in Porous Electrodes Parthasarathy M. Gomadam*,a,z John W.
More informationSupplementary Materials for Robust Estimation of the False Discovery Rate
Sulementary Materials for Robust Estimation of the False Discovery Rate Stan Pounds and Cheng Cheng This sulemental contains roofs regarding theoretical roerties of the roosed method (Section S1), rovides
More informationChapter 7 Sampling and Sampling Distributions. Introduction. Selecting a Sample. Introduction. Sampling from a Finite Population
Chater 7 and s Selecting a Samle Point Estimation Introduction to s of Proerties of Point Estimators Other Methods Introduction An element is the entity on which data are collected. A oulation is a collection
More informationP043 Anisotropic 2.5D - 3C Finite-difference Modeling
P04 Anisotroic.5D - C Finite-difference Modeling A. Kostyukevych* (esseral echnologies Inc.), N. Marmalevskyi (Ukrainian State Geological Prosecting Institute), Y. Roganov (Ukrainian State Geological Prosecting
More informationPollution. Elixir Pollution 97 (2016)
42253 Available online at www.elixirpublishers.com (Elixir International Journal) Pollution Elixir Pollution 97 (2016) 42253-42257 Analytical Solution of Temporally Dispersion of Solute through Semi- Infinite
More informationChapter 1 Fundamentals
Chater Fundamentals. Overview of Thermodynamics Industrial Revolution brought in large scale automation of many tedious tasks which were earlier being erformed through manual or animal labour. Inventors
More information2. The lattice Boltzmann for porous flow and transport
Lattice Boltzmann for flow and transort henomena 2. The lattice Boltzmann for orous flow and transort Li Chen XJTU, 2018/05/30 Mail: lichennht08@mail.xjtu.edu.cn htt://gr.xjtu.edu.cn/web/lichennht08 1/66
More informationSession 5: Review of Classical Astrodynamics
Session 5: Review of Classical Astrodynamics In revious lectures we described in detail the rocess to find the otimal secific imulse for a articular situation. Among the mission requirements that serve
More informationEmpirical Bayesian EM-based Motion Segmentation
Emirical Bayesian EM-based Motion Segmentation Nuno Vasconcelos Andrew Liman MIT Media Laboratory 0 Ames St, E5-0M, Cambridge, MA 09 fnuno,lig@media.mit.edu Abstract A recent trend in motion-based segmentation
More informationMain Menu. Summary (1)
Elastic roerty changes of bitumen reservoir during steam injection Ayato Kato*, University of Houston, higenobu Onozuka, JOGMEC, and Toru Nakayama, JAPEX ummary Elastic roerty changes of bitumen reservoir
More informationProbability of dike failure due to uplifting and piping
Probability of dike failure due to lifting and iing J.M. van Noortwijk KV Consultants, P.O. Bo 0, 803 AC Lelystad, The Netherlands A.C.W.M. Vrouwenvelder TNO Building and Construction Research, P.O. Bo
More informationUnsteady Flow of a Dusty Conducting Fluid through porous medium between Parallel Porous Plates with Temperature Dependent Viscosity and Heat Source
Volume Issue3 3- June www.ijsret.org ISSN 78-88 Unsteady Flow of a Dusty Conducting Fluid through orous medium between Parallel Porous Plates with Temerature Deendent Viscosity and Heat Source Shalini
More informationSynoptic Meteorology I: The Geostrophic Approximation. 30 September, 7 October 2014
The Equations of Motion Synotic Meteorology I: The Geostrohic Aroimation 30 Setember, 7 October 2014 In their most general form, and resented without formal derivation, the equations of motion alicable
More information1 University of Edinburgh, 2 British Geological Survey, 3 China University of Petroleum
Estimation of fluid mobility from frequency deendent azimuthal AVO a synthetic model study Yingrui Ren 1*, Xiaoyang Wu 2, Mark Chaman 1 and Xiangyang Li 2,3 1 University of Edinburgh, 2 British Geological
More informationHomogeneous and Inhomogeneous Model for Flow and Heat Transfer in Porous Materials as High Temperature Solar Air Receivers
Excert from the roceedings of the COMSOL Conference 1 aris Homogeneous and Inhomogeneous Model for Flow and Heat ransfer in orous Materials as High emerature Solar Air Receivers Olena Smirnova 1 *, homas
More informationAnalysis of Pressure Transient Response for an Injector under Hydraulic Stimulation at the Salak Geothermal Field, Indonesia
roceedings World Geothermal Congress 00 Bali, Indonesia, 5-9 Aril 00 Analysis of ressure Transient Resonse for an Injector under Hydraulic Stimulation at the Salak Geothermal Field, Indonesia Jorge A.
More informationCheng, N. S., and Law, A. W. K. (2003). Exponential formula for computing effective viscosity. Powder Technology. 129(1-3),
THIS PAPER SHOULD BE CITED AS Cheng, N. S., and Law, A. W. K. (2003). Exonential ormula or comuting eective viscosity. Powder Technology. 129(1-3), 156 160. EXPONENTIAL FORMULA FOR COMPUTING EFFECTIVE
More informationWolfgang POESSNECKER and Ulrich GROSS*
Proceedings of the Asian Thermohysical Proerties onference -4 August, 007, Fukuoka, Jaan Paer No. 0 A QUASI-STEADY YLINDER METHOD FOR THE SIMULTANEOUS DETERMINATION OF HEAT APAITY, THERMAL ONDUTIVITY AND
More informationPHYSICAL REVIEW LETTERS
PHYSICAL REVIEW LETTERS VOLUME 81 20 JULY 1998 NUMBER 3 Searated-Path Ramsey Atom Interferometer P. D. Featonby, G. S. Summy, C. L. Webb, R. M. Godun, M. K. Oberthaler, A. C. Wilson, C. J. Foot, and K.
More informationREFINED STRAIN ENERGY OF THE SHELL
REFINED STRAIN ENERGY OF THE SHELL Ryszard A. Walentyński Deartment of Building Structures Theory, Silesian University of Technology, Gliwice, PL44-11, Poland ABSTRACT The aer rovides information on evaluation
More informationResponse of tall Steel Moment Resisting Frames (SMRF) to near-fault pulse-like ground motion
Resonse of tall Steel Moment Resisting Frames (SMRF) to near-fault ulse-like ground motion R. Ruakhety & R. Sigbjörnsson Earthquake Engineering Research Center (EERC), University of Iceland SUMMARY: his
More informationFactors Effect on the Saturation Parameter S and there Influences on the Gain Behavior of Ytterbium Doped Fiber Amplifier
Australian Journal of Basic and Alied Sciences, 5(12): 2010-2020, 2011 ISSN 1991-8178 Factors Effect on the Saturation Parameter S and there Influences on the Gain Behavior of Ytterbium Doed Fiber Amlifier
More informationA mathematical model for RTM process simulations in geometries with irregular shapes
Int. Jnl. of Multihysics Volume 8 Number 3 2014 285 A mathematical model for RTM rocess simulations in geometries with irregular shaes Brauner Gonçalves Coutinho 1, Vanja Maria França Bezerra 2, Severino
More informationTurbulent Flow Simulations through Tarbela Dam Tunnel-2
Engineering, 2010, 2, 507-515 doi:10.4236/eng.2010.27067 Published Online July 2010 (htt://www.scirp.org/journal/eng) 507 Turbulent Flow Simulations through Tarbela Dam Tunnel-2 Abstract Muhammad Abid,
More informationEffective conductivity in a lattice model for binary disordered media with complex distributions of grain sizes
hys. stat. sol. b 36, 65-633 003 Effective conductivity in a lattice model for binary disordered media with comlex distributions of grain sizes R. PIASECKI Institute of Chemistry, University of Oole, Oleska
More informationLightning Attachment Models and Perfect Shielding Angle of Transmission Lines
Lightning Attachment Models and Perfect Shielding Angle of Transmission Lines Pantelis N. Mikrooulos 1 and Thomas E. Tsovilis High Voltage Laboratory, School of Electrical & Comuter Engineering, Faculty
More informationFinite Element Solution to Groundwater Transport of Solutes Undergoing Decay and Non-Linear Sorption
Hydrology Days 2010 1 Finite Element Solution to Groundwater Transport of Solutes Undergoing Decay and Non-Linear Sorption Domenico Baú Department of Civil & Environmental Engineering Colorado State University,
More informationFlying characteristics in the free molecular region (influence of accommodation coefficients)
Microsyst Technol (25) 11: 85 811 DOI 1.17/s542-5-538- TECHNICAL PAPER Shigehisa Fukui Æ Hidekazu Shimada Æ Kiyomi Yamane Hiroshige Matsuoka Flying characteristics in the free molecular region (influence
More informationModelling heat transfer and fluid flow inside a pressure cooker
17 th Euroean Symosium on Comuter Aided Process Engineering ESCAPE17 V. Plesu and P.S. Agachi (Editors) 2007 Elsevier B.V. All rights reserved. 1 Modelling heat transfer and fluid flow inside a ressure
More informationChapter 2 Introductory Concepts of Wave Propagation Analysis in Structures
Chater 2 Introductory Concets of Wave Proagation Analysis in Structures Wave roagation is a transient dynamic henomenon resulting from short duration loading. Such transient loadings have high frequency
More informationPressure-sensitivity Effects on Toughness Measurements of Compact Tension Specimens for Strain-hardening Solids
American Journal of Alied Sciences (9): 19-195, 5 ISSN 1546-939 5 Science Publications Pressure-sensitivity Effects on Toughness Measurements of Comact Tension Secimens for Strain-hardening Solids Abdulhamid
More informationRe-entry Protocols for Seismically Active Mines Using Statistical Analysis of Aftershock Sequences
Re-entry Protocols for Seismically Active Mines Using Statistical Analysis of Aftershock Sequences J.A. Vallejos & S.M. McKinnon Queen s University, Kingston, ON, Canada ABSTRACT: Re-entry rotocols are
More informationChurilova Maria Saint-Petersburg State Polytechnical University Department of Applied Mathematics
Churilova Maria Saint-Petersburg State Polytechnical University Deartment of Alied Mathematics Technology of EHIS (staming) alied to roduction of automotive arts The roblem described in this reort originated
More informationCFD Modelling of Mass Transfer and Interfacial Phenomena on Single Droplets
Euroean Symosium on Comuter Arded Aided Process Engineering 15 L. Puigjaner and A. Esuña (Editors) 2005 Elsevier Science B.V. All rights reserved. CFD Modelling of Mass Transfer and Interfacial Phenomena
More informationBifurcation-Based Stability Analysis of Electrostatically Actuated Micromirror as a Two Degrees of Freedom System
Coyright 8 Tech Science Press CMES, vol.4, no.,.6-76, 8 Bifurcation-Based Stability Analysis of Electrostatically Actuated Micromirror as a Two Degrees of Freedom System Kuntao Ye, *, Yan Luo and Yingtao
More informationCombining Logistic Regression with Kriging for Mapping the Risk of Occurrence of Unexploded Ordnance (UXO)
Combining Logistic Regression with Kriging for Maing the Risk of Occurrence of Unexloded Ordnance (UXO) H. Saito (), P. Goovaerts (), S. A. McKenna (2) Environmental and Water Resources Engineering, Deartment
More informationFlexible Pipes in Trenches with Stiff Clay Walls
Flexible Pies in Trenches with Stiff Clay Walls D. A. Cameron University of South Australia, South Australia, Australia J. P. Carter University of Sydney, New South Wales, Australia Keywords: flexible
More informationEffect of Wall Flexibility on Dynamic Response of Concrete Rectangular Liquid Storage Tanks under Horizontal and Vertical Ground Motions
Effect of Wall Flexibility on Dynamic Resonse of Concrete Rectangular Liquid Storage Tanks under Horizontal and Vertical Ground Motions A. R. Ghaemmaghami 1 and M. R. Kianoush 2 Abstract: In this study,
More informationVI. Electrokinetics. Lecture 31: Electrokinetic Energy Conversion
VI. Electrokinetics Lecture 31: Electrokinetic Energy Conversion MIT Student 1 Princiles 1.1 General Theory We have the following equation for the linear electrokinetic resonse of a nanochannel: ( ) (
More informationMonte Carlo simulation of radioactive contaminant transport in groundwater
Politecnico di Milano Diartimento di Ingegneria Nucleare Dottorato di Ricerca in Scianza e Tecnologia delle Radiazioni Monte Carlo simulation of radioactive contaminant transort in groundwater Tesi di
More informationEffects of Mud Properties, Hole size, Drill String Tripping Speed and Configurations on Swab and Surge Pressure Magnitude during Drilling Operations
International Journal of Petroleum Science and Technology ISSN 0973-638 Volume 6, Number (01),. 143-15 Research India Publications htt://www.riublication.com/ijst.htm Effects of Mud Proerties, Hole size,
More informationSimulation Of Vertical Gas-Solid Flow: Comparison Of Correlations For Particle-Wall Friction And Drag Coefficient
International Journal of ChemTech search CODEN( USA): IJCRGG ISSN : 0974-4290 Vol.4, No.4, 1314-1321, Oct-Dec 2012 Simulation Of Vertical Gas-Solid Flow: Comarison Of Correlations For article-wall Friction
More informationIntegrating Lidar and Atmospheric Boundary Layer Measurements to Determine Fluxes and Dynamics of Particulate Emissions from an Agriculture Facility
Integrating Lidar and Atmosheric Boundary Layer Measurements to Determine Fluxes and Dynamics of Particulate Emissions from an Agriculture Facility Lawrence His 1, John H. Prueger 2, Jerry Hatfield 2,
More informationHeat Transfer Modeling using ANSYS FLUENT
Lecture 7 Heat raner in Porou Media 14.5 Releae Heat raner Modeling uing ANSYS FLUEN 2013 ANSYS, Inc. March 28, 2013 1 Releae 14.5 Agenda Introduction Porou Media Characterization he Rereentative Elementary
More informationRATE-DEPENDENT MECHANICAL BEHAVIOR OF CFRP LAMINATES UNDER COMPRESSION LOADING
RATE-DEPENDENT MECHANICAL BEHAVIOR OF CFRP LAMINATES UNDER COMPRESSION LOADING R. M. Guedes 1,, P. H. Magalhães, F. Ferreira 3 and J. L. Morais 4 1 Deartamento de Engenharia Mecânica e Gestão Industrial,
More informationPreliminary Uncertainty Estimation of the Pressure Distortion Coefficient of a Pressure. Balance by FEM Calculations
Preliminary Uncertainty Estimation of the Pressure Distortion Coefficient of a Pressure Balance by FEM Calculations G. Molinar*, M. Bergoglio*, G. Mosso*,G. Buonanno**, M. Dell Isola** * Istituto di Metrologia
More informationCFD AS A DESIGN TOOL FOR FLUID POWER COMPONENTS
CFD AS A DESIGN TOOL FOR FLUID POWER COMPONENTS M. BORGHI - M. MILANI Diartimento di Scienze dell Ingegneria Università degli Studi di Modena Via Cami, 213/b 41100 Modena E-mail: borghi@omero.dsi.unimo.it
More informationComposites: Part A 40 (2009) Contents lists available at ScienceDirect. Composites: Part A
Comosites: Part A 40 (2009) 860 869 Contents lists available at ScienceDirect Comosites: Part A journal homeage: www.elsevier.com/locate/comositesa A general model for the ermeability of fibrous orous
More informationCFD MODELLING OF LIQUID JET AND CASCADE BREAKUP IN CROSSFLOWS
Seventh International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 9-11 December 2009 CFD MODELLING OF LIQUID JET AND CASCADE BREAKUP IN CROSSFLOWS Benny KUAN Process
More informationMeasurement of cyclone separator
Measurement of cyclone searator. Aim of the measurement Cyclones are widely used in industry (in food and chemical industry, in energy technology and in buildings) to remove dust and other articles from
More informationDiffuse Interface Models for Metal Foams
Diffuse Interface Models for Metal Foams B. Chinè 1,3, M. Monno 2,3, E. Reossi 3, M. Verani 3 1 Instituto Tecnològico de Costa Rica, Costa Rica; 2 Politecnico di Milano, Italy; 3 Laboratorio MUSP, Macchine
More informationSystem Reliability Estimation and Confidence Regions from Subsystem and Full System Tests
009 American Control Conference Hyatt Regency Riverfront, St. Louis, MO, USA June 0-, 009 FrB4. System Reliability Estimation and Confidence Regions from Subsystem and Full System Tests James C. Sall Abstract
More information1. Conduction. Percolation model (which assumes isotropic media) gives
1. Conduction In the revious lecture, we considered conduction of electricity (or heat conduction or mass diffusion) in a comosite medium, where each comonent has a nonzero conductivity. In a orous medium,
More informationEstimation of component redundancy in optimal age maintenance
EURO MAINTENANCE 2012, Belgrade 14-16 May 2012 Proceedings of the 21 st International Congress on Maintenance and Asset Management Estimation of comonent redundancy in otimal age maintenance Jorge ioa
More informationApplied Fitting Theory VI. Formulas for Kinematic Fitting
Alied Fitting heory VI Paul Avery CBX 98 37 June 9, 1998 Ar. 17, 1999 (rev.) I Introduction Formulas for Kinematic Fitting I intend for this note and the one following it to serve as mathematical references,
More informationA PEAK FACTOR FOR PREDICTING NON-GAUSSIAN PEAK RESULTANT RESPONSE OF WIND-EXCITED TALL BUILDINGS
The Seventh Asia-Pacific Conference on Wind Engineering, November 8-1, 009, Taiei, Taiwan A PEAK FACTOR FOR PREDICTING NON-GAUSSIAN PEAK RESULTANT RESPONSE OF WIND-EXCITED TALL BUILDINGS M.F. Huang 1,
More informationImproving the Nomad microscopic walker model Mario Campanella*. Serge Hoogendoorn* Winnie Daamen*
th IFAC Symosium on Transortation Systems Redondo Beach, CA, USA, Setember -4, 9 Imroving the Nomad microscoic walker model Mario Camanella*. Serge Hoogendoorn* Winnie Daamen* *Transort & Planning Deartment,
More informationDirect Numerical Simulation Of Particle Saltation In Turbulent Channel Flow
City University of New York (CUNY) CUNY Academic Works International Conference on Hydroinformatics 8-1-2014 Direct Numerical Simulation Of Particle Saltation In Turbulent Channel Flow Chunning Ji Ante
More informationAvailable online at ScienceDirect. Procedia Engineering 102 (2015 )
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 1 (15 ) 3 38 The 7th World Congress on Particle Technology (WCPT7) Characterization of Colloidal Particles using Electrical
More informationOn the elasticity of transverse isotropic soft tissues (L)
J_ID: JAS DOI: 10.1121/1.3559681 Date: 17-March-11 Stage: Page: 1 Total Pages: 5 ID: 3b2server Time: 12:24 I Path: //xinchnasjn/aip/3b2/jas#/vol00000/110099/appfile/ai-jas#110099 1 2 3 4 5 6 7 AQ18 9 10
More informationPolarization Mode Dispersion Mitigation through Spun Fibers
INTERNATIONAL JOURNAL O MICROWAVE AND OPTICAL TECHNOLOGY, 176 VOL.5 NO.3 MAY 1 Polarization Mode Disersion Mitigation through Sun ibers Dowluru Ravi Kumar*, Dr.. Prabhakara Rao * Lecturer in ECE, Deartment
More informationNumerical Solution of the Two-Dimensional Time-Dependent Transport Equation. Khaled Ismail Hamza 1 EXTENDED ABSTRACT
Second International Conference on Saltwater Intrusion and Coastal Aquifers Monitoring, Modeling, and Management. Mérida, México, March 3-April 2 Numerical Solution of the Two-Dimensional Time-Dependent
More informationSELF-SIMILAR FLOW UNDER THE ACTION OF MONOCHROMATIC RADIATION BEHIND A STRONG CYLINDRICAL SHOCK WAVE IN A NON-IDEAL GAS
SELF-SIMILAR FLOW UNDER THE ACTION OF MONOCHROMATIC RADIATION BEHIND A STRONG CYLINDRICAL SHOCK WAVE IN A NON-IDEAL GAS *J. P. Vishwakarma and Vijay Kumar Pandey Deartment of Mathematics & Statistics,
More informationOptimal array pattern synthesis with desired magnitude response
Otimal array attern synthesis with desired magnitude resonse A.M. Pasqual a, J.R. Arruda a and P. erzog b a Universidade Estadual de Caminas, Rua Mendeleiev, 00, Cidade Universitária Zeferino Vaz, 13083-970
More informationMODELING THE RELIABILITY OF C4ISR SYSTEMS HARDWARE/SOFTWARE COMPONENTS USING AN IMPROVED MARKOV MODEL
Technical Sciences and Alied Mathematics MODELING THE RELIABILITY OF CISR SYSTEMS HARDWARE/SOFTWARE COMPONENTS USING AN IMPROVED MARKOV MODEL Cezar VASILESCU Regional Deartment of Defense Resources Management
More informationA compression line for soils with evolving particle and pore size distributions due to particle crushing
Russell, A. R. (2011) Géotechnique Letters 1, 5 9, htt://dx.doi.org/10.1680/geolett.10.00003 A comression line for soils with evolving article and ore size distributions due to article crushing A. R. RUSSELL*
More informationCentral Force Motion Challenge Problems
Central Force Motion Challenge Problems Problem 1: Ellitic Orbit A satellite of mass m s is in an ellitical orbit around a lanet of mass m which is located at one focus of the ellise. The satellite has
More informationu Velocity in x-direction Velocity in y-direction g- Acceleration due to gravity c - Specific heat at constant presure
International Journal of Engineering Research and Develoment ISSN: 78-67X, Volume 1, Issue 8 (June 1), PP.-6.ijerd.com Boundary Layer Flo in Porous Medium Past a Moving Vertical Plate ith Variable Thermal
More informationMAHALAKSHMI ENGINEERING COLLEGE TIRUCHIRAPALLI
MAHALAKSHMI ENGINEERING COLLEGE TIRUCHIRAPALLI 6113 DEPARTMENT: CIVIL SUB.CODE/ NAME: CE6303/ MECHANICS OF FLUIDS SEMESTER: III UNIT-1 FLUID PROPERTIES TWO MARK QUESTIONS AND ANSWERS 1. Define fluid mechanics.(auc
More informationModeling Chlorine Decay in Pipes using Two- State Random Walk Approach
International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 8958, Volume-4 Issue-3, February 2015 Modeling Chlorine Decay in Pies using Two- State Random Walk Aroach Y. M. Mahrous,
More informationChapter 8 Internal Forced Convection
Chater 8 Internal Forced Convection 8.1 Hydrodynamic Considerations 8.1.1 Flow Conditions may be determined exerimentally, as shown in Figs. 7.1-7.2. Re D ρumd μ where u m is the mean fluid velocity over
More informationAn Investigation on the Numerical Ill-conditioning of Hybrid State Estimators
An Investigation on the Numerical Ill-conditioning of Hybrid State Estimators S. K. Mallik, Student Member, IEEE, S. Chakrabarti, Senior Member, IEEE, S. N. Singh, Senior Member, IEEE Deartment of Electrical
More informationEffect of Hall current and rotation on heat transfer in MHD flow of oscillating dusty fluid in a porous channel
Indian Journal of Pure & Alied Physics Vol. 5 October 03. 669-68 Effect of Hall current and rotation on heat transfer in MHD flow of oscillating dusty fluid in a orous channel Khem Chand K D Singh & Shavnam
More informationSAS for Bayesian Mediation Analysis
Paer 1569-2014 SAS for Bayesian Mediation Analysis Miočević Milica, Arizona State University; David P. MacKinnon, Arizona State University ABSTRACT Recent statistical mediation analysis research focuses
More informationCHARACTERIZATION OF HETEROGENEITIES AT THE CORE-SCALE USING THE EQUIVALENT STRATIFIED POROUS MEDIUM APPROACH
SCA006-49 /6 CHARACTERIZATION OF HETEROGENEITIES AT THE CORE-SCALE USING THE EQUIVALENT STRATIFIED POROUS MEDIUM APPROACH Mostafa FOURAR LEMTA Ecole des Mines de Nancy, Parc de Saurupt, 54 04 Nancy, France
More informationInfluence of the adsorbent particle size distribution on the adsorption parameters from stirred tank dynamic experiments
Influence of the adsorbent article size distribution on the adsortion arameters from stirred tank dynamic exeriments Proceedings of Euroean Congress of Chemical Engineering (ECCE-6) Coenhagen, 16-20 Setember
More informationExperiments on ring wave packet generated by water drop
Chinese Science Bulletin 2008 SCIENCE IN CHINA PRESS Sringer Exeriments on ring wave acket generated by water dro ZHU GuoZhen, LI ZhaoHui & FU DeYong Deartment of Physics, Tsinghua University, Beijing
More informationF. BEN ABDELGHANI a,b. Tunisie;
Use of The HydroGeosphere code to simulate Water flow and contaminants transport around mining waste disposed into an open pit within fractured rock mass. F. BEN ABDELGHANI a,b a Departement of Civil,
More informationSpin Diffusion and Relaxation in a Nonuniform Magnetic Field.
Sin Diffusion and Relaxation in a Nonuniform Magnetic Field. G.P. Berman, B. M. Chernobrod, V.N. Gorshkov, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 V.I. Tsifrinovich
More informationPERFORMANCE BASED DESIGN SYSTEM FOR CONCRETE MIXTURE WITH MULTI-OPTIMIZING GENETIC ALGORITHM
PERFORMANCE BASED DESIGN SYSTEM FOR CONCRETE MIXTURE WITH MULTI-OPTIMIZING GENETIC ALGORITHM Takafumi Noguchi 1, Iei Maruyama 1 and Manabu Kanematsu 1 1 Deartment of Architecture, University of Tokyo,
More informationOn Line Parameter Estimation of Electric Systems using the Bacterial Foraging Algorithm
On Line Parameter Estimation of Electric Systems using the Bacterial Foraging Algorithm Gabriel Noriega, José Restreo, Víctor Guzmán, Maribel Giménez and José Aller Universidad Simón Bolívar Valle de Sartenejas,
More informationCHAPTER-II Control Charts for Fraction Nonconforming using m-of-m Runs Rules
CHAPTER-II Control Charts for Fraction Nonconforming using m-of-m Runs Rules. Introduction: The is widely used in industry to monitor the number of fraction nonconforming units. A nonconforming unit is
More informationOptical Fibres - Dispersion Part 1
ECE 455 Lecture 05 1 Otical Fibres - Disersion Part 1 Stavros Iezekiel Deartment of Electrical and Comuter Engineering University of Cyrus HMY 445 Lecture 05 Fall Semester 016 ECE 455 Lecture 05 Otical
More informationEvaluating Process Capability Indices for some Quality Characteristics of a Manufacturing Process
Journal of Statistical and Econometric Methods, vol., no.3, 013, 105-114 ISSN: 051-5057 (rint version), 051-5065(online) Scienress Ltd, 013 Evaluating Process aability Indices for some Quality haracteristics
More informationSolute dispersion in a variably saturated sand
WATER RESOURCES RESEARCH, VOL. 39, NO. 6, 1155, doi:10.1029/2002wr001649, 2003 Solute dispersion in a variably saturated sand Takeshi Sato Department of Civil Engineering, Gifu University, Yanagido, Gifu,
More informationThe Binomial Approach for Probability of Detection
Vol. No. (Mar 5) - The e-journal of Nondestructive Testing - ISSN 45-494 www.ndt.net/?id=7498 The Binomial Aroach for of Detection Carlos Correia Gruo Endalloy C.A. - Caracas - Venezuela www.endalloy.net
More informationLiquid water static energy page 1/8
Liquid water static energy age 1/8 1) Thermodynamics It s a good idea to work with thermodynamic variables that are conserved under a known set of conditions, since they can act as assive tracers and rovide
More informationNumerical Modeling of Powder Flow during Coaxial Laser Direct Metal Deposition Comparison between Ti-6Al-4V Alloy and Stainless Steel 316L
Numerical Modeling of Powder Flow during Coaxial Laser Direct Metal Deosition Comarison between Ti-6Al-4V Alloy and Stainless Steel 316L S. Morville 1, M. Carin *1, D. Carron 1, P. Le Masson 1, M. Gharbi,
More informationChristopher Godwin Udomboso [a],*
Progress in Alied Mathematics Vol. 5, No., 03,. 40 47 DOI: 0.3968/j.am.955803050.994 ISSN 95-5X Print ISSN 95-58 Online www.cscanada.net www.cscanada.org On Some Proerties of a Hetereogeneous Transfer
More informationarxiv: v1 [physics.data-an] 26 Oct 2012
Constraints on Yield Parameters in Extended Maximum Likelihood Fits Till Moritz Karbach a, Maximilian Schlu b a TU Dortmund, Germany, moritz.karbach@cern.ch b TU Dortmund, Germany, maximilian.schlu@cern.ch
More informationYu. Senichev, on behalf of the JEDI Collaboration*
Mitglied der Helmholtz-emeinschaft STORA RIN DM SIMULATION: MTHODS AND RSULTS Yu. Senichev, on behalf of the JDI Collaboration* 3. August 0 lectric Diole Moment and Standard Model In frame of SM among
More informationVarious Pattern-Forming States of Nematic Liquid Crystal Based on the Sign Inversion of Dielectric Anisotropy
Macromolecular Research, Vol. 15, No. 5, 396-402 (2007) Various Pattern-Forming States of Nematic Liquid Crystal Based on the Sign nversion of Dielectric Anisotroy Shin-Woong Kang* and Liang-Chy Chien
More information