theoretical and numerical modeling

... advanced and revised contributions, and it covers mainly (1) numerical modeling of heat transfer, (2) two phase flow, (3) nanofluids, and (4) phase change The first section introduces numerical modeling ... Benta and Catalin Mihai Chapter Numerical Modeling and Experimentation on Evaporator Coils for Refrigeration in Dry and Frosting Operational Conditions 27 Zine Aidoun, Mohamed Ouzzane and Adlane ... Phase Flow, Phase Change and Numerical Modeling, Edited by Amimul Ahsan p cm ISBN 978-953-307-584-6 Contents Preface IX Part Numerical Modeling of Heat Transfer Chapter Modeling the Physical Phenomena...

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... (2006) Investigation of Numerical Techniques with Comparison Between Anlytical and Explicit and Implicit Methods of Solving One- 26 Two Phase Flow, Phase Change and Numerical Modeling Dimensional ... temperature applications and novel modeling treatment of circuit design and frost deposition control 2.1 Modeling Modeling of refrigeration heat exchangers for design and performance prediction ... 2004b), (Wang et al., 1996) and (Wang et al., 1997) 32 Two Phase Flow, Phase Change and Numerical Modeling Research at CanmetENERGY 3.1 Theoretical approach Two essential and most uncertain coil...

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... water 62 Two Phase Flow, Phase Change and Numerical Modeling and refrigerant sides, in order to effectively shorten or reduce the time and cost in the development and design of this type of heat exchanger, ... [W/m2K], di and are, respectively, the inside and outside diameters of tubes 68 Two Phase Flow, Phase Change and Numerical Modeling [m], km is the thermal conductivity [W/mK], Rfi and Rfo are ... Phase Change and Numerical Modeling The present modeling procedures for determining the total heat transfer rate are shown as Fig and detailed as following steps: Input design parameters and geometry...

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... capillary limit and the evaporator boiling limit An improved model is suggested and it is compared with the simulation and experimental Theoretical and Experimental Analysis of Flows and Heat Transfer ... refrigerant outlet temperature, and (c) heat transfer rate 81 82 Two Phase Flow, Phase Change and Numerical Modeling References Allen, B., & Gosselin, L (2008) Optimal geometry and flow arrangement for ... cylinder and the teperature of oulet cylinder are 300 and 350 K Figs and show flow field with a vortex flow In Fig 3, teperature of the inlet cylinder and the teperature of oulet cylinder are 300 and...

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... τlw = τ vw = Where kl and kv are the Poiseuille numbers, and Dhlw and Dhvw are the liquid-wall and the vapor-wall hydraulic diameters, respectively The hydraulic diameters and the shear stresses ... order to understand the internal stress distribution in the solidifying steel strand below the mold The need for data with respect to the 122 Two Phase Flow, Phase Change and Numerical Modeling mechanical ... term and a temperature dependent term and can be related to correspond to the latent heat of phase change Furthermore, T is the temperature, and ρ, Cp, and k are the density, heat capacity, and...

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... attainment and maintenance of the plasma density and temperature on a required level and forces to develop sophisticated and expansive methods to feed and heat up the plasma components On the other hand, ... ∂rZ Numerical approaches elaborated to overcome problems arising on this way are presented and highlighted below on several examples 154 Two Phase Flow, Phase Change and Numerical Modeling Numerical ... Lines and depict the centreline and surface temperature, respectively Lines and illustrate the shell growth and solid fraction, respectively The borders of the final casting segments 5, 6, and...

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... Nematollahi and Nazifi, 2007; Rodriguez and El-Genk, 2008a, b, c, and d; Rodriguez, Domino, and El-Genk, 2010; Rodriguez and El-Genk, 2010a and b; Rodriguez and El-Genk, 2011) There are many devices and ... and Γ ω are the effective diffusivity of k and ω, respectively; Gk and Gω are the generation of k and ω, respectively, due to mean velocity gradients; and Yk and Yω are the dissipation of k and ... azimuthal, (a) and (b), and axial, (c) and (d), velocity profiles for S2 configuration Q ≈ 100 l/h for (a) and (c); and Q ≈ 270 l/h for (b) and (d) The circles indicate mean velocity values and the error...

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... Goldstein and Behbahani, 1982; Kamotani and Greber, 1974; Kavsaoglu and Schetz, 1989; Kawai and Lele, 2007; Kiel et al., 2003; Patankar, Basu, and Alpay, 1977; Rivero, Ferre, and Giralt, 2001; Sucec and ... Applications for Enhanced Heat Transfer and Flow Mixing Fig 12 Impact of Re and θ on Azimuthal Velocity Field 203 204 Two Phase Flow, Phase Change and Numerical Modeling The single-jet computation ... Manual of Applied Mechanics, 9th Ed., C Griffin and Co., London, UK 216 Two Phase Flow, Phase Change and Numerical Modeling Rivero, A., Ferre, J A., and Giralt, F (2001) Organized Motions in a Jet...

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... inlet temperature and exit quality To the aim, both basic experiments and numerical analyses are necessary This work is dedicated to the study (from theoretical, numerical and experimental point ... Change and Numerical Modeling For pulsed laser ablation of metals, the ultrafast heating mechanisms perform great disparity for femtosecond and nanosecond pulse duration In fact, the electron and ... Phase Change and Numerical Modeling Fig The temporal evolution of electron and phonon temperature fields in two layer Au/Ag film assembly (A) Phonon temperature fields at 500fs, 1ps and 4ps; (B)...

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... section and approximation of the helical shape by assuming a straight channel long as the helical tube and with the same inclination of the helix 280 Two Phase Flow, Phase Change and Numerical Modeling ... jet impingement and spray cooling have achieved very high heat fluxes (over 100 W/cm2) and heat transfer coefficients compared 286 Two Phase Flow, Phase Change and Numerical Modeling to the other ... density ρH and the reaction frequency Ω (Lahey Jr & Moody, 1977) as follows: ( ) ρH = ρ f − α + ρgα = Ω(t ) = Q(t )v fg AHh fg v f + xv fg (8) (9) 266 Two Phase Flow, Phase Change and Numerical Modeling...

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... of low heat flux and surface superheat Pautsch and Shedd (2005) and Shedd and Pautsch (2005) conducted a series of spray cooling experiments with single and multiple nozzles and developed an ... ρv (9) where c and n were unknown beforehand, and then obtained using the experimental CHF data that c=0.386 and n=0.549, with the standard errors of 0.039 for c, 0.0154 for n, and 0.937 for the ... typical boiling curve 294 Two Phase Flow, Phase Change and Numerical Modeling 2.2.1 Theoretical model Correct CHF estimation requires a clear understanding of the physical phenomenon that triggers the...

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... Phase Change and Numerical Modeling ′ sin θ w nf = , sin θ f′ nw (8) where θ’w and θ’f are the angles of incidence and refraction, and x0 and y0 are the intersection points between laser and inner ... 324 Two Phase Flow, Phase Change and Numerical Modeling measurements of the apparent contact angle and the curvature of a drop and meniscus during condensation and evaporation processes in a constrained ... Two Phase Flow, Phase Change and Numerical Modeling cavity and get sucked in, resulting in a spectacular self-drying of the top surface (Narhe & Beysens, 2004), and/ or (ii) coalesce with another...

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... 0.629 (Ca < 0.3, Re < 2000) , (21) 352 Two Phase Flow, Phase Change and Numerical Modeling where Ca = μU/σ and Re = ρUDh/μ and We = ρU2Dh/σ As capillary number approaches zero, Eq (21) should ... the water experiment is much smaller than those of other fluids and the 354 Two Phase Flow, Phase Change and Numerical Modeling numerical results It is confirmed that inertial effect must be considered ... restraint, the relation of Dh and δ0_corner is expressed as follows: 356 Two Phase Flow, Phase Change and Numerical Modeling 2 −1 ≥ Dh δ _ corner (27) From Eqs (23) and (27), the maximum value...

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... heated from horizontal and vertical sides and cooled from vertical side., Archives of Thermodynamics, Vol 31(2010), No 4, pp 51-59 386 Two Phase Flow, Phase Change and Numerical Modeling Bieliński, ... respectively Ue (s) and UVW (s), is sufficient to explain any tendency to the aggregation of the suspension This concept was developed by Derjaguin and Landau and also by Vervey and Overbeck In the ... in nanoparticulate form to the 390 Two Phase Flow, Phase Change and Numerical Modeling Will-be-set-by-IN-TECH fluid of interest and are named nanofluids, a term introduced by Choi in 1995 (Choi,...

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... dispersion of results and numerical models proposed until now Systematic comparative studies and use of molecular dynamic simulations for transport coefficients modeling and Monte-Carlo simulations ... Effects of Reynolds number and concentration of nanoparticles on the heat transfer performance are also reported and discussed 422 Two Phase Flow, Phase Change and Numerical Modeling Literature survey ... specific heat of the fluid, Tin and Tout are the inlet and outlet fluid temperature, respectively and Ti,w (x) and Tm(x) are the inner wall temperature of the tube and the mean bulk fluid temperature...

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... Microfluidics and Nanofluidics, 2010 8(2): p 145-170 448 Two Phase Flow, Phase Change and Numerical Modeling [28] Li, Y.J., et al., A review on development of nanofluid preparation and characterization ... Cheng, L.X., E.P Bandarra, and J.R Thome, Nanofluid Two-Phase Flow and Thermal Physics: A New Research Frontier of Nanotechnology and Its Challenges Journal of Nanoscience and Nanotechnology, ... Journal of Renewable and Sustainable Energy, 2010: p 033102 (13 pp.) 450 Two Phase Flow, Phase Change and Numerical Modeling [67] Timofeeva, E.V., et al., The Particle Size and Interfacial Effects...

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... (semiconductors and electronic components cooling) • Air conditioning and refrigeration, process materials and fire investigation and design architects In other words, FLUENT a suitable choice for modeling ... anode side and result in good performance in reaction 496 Two Phase Flow, Phase Change and Numerical Modeling With simulation of heat transfer, is found heat distribution in the cell and can be ... experimental determinations by Vasu and all (Vasu et al., in press): 0.4 Nunf = 0.0023 ⋅ Re0.8 ⋅ Prnf nf (99) 472 Two Phase Flow, Phase Change and Numerical Modeling where the Reynolds number...

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... Considering dilatancy, and the Mohr-Coulomb criterion Acta Mech., Vol 152, pp 121-138 518 Two Phase Flow, Phase Change and Numerical Modeling Massoudi, M & N K Anand (2004) A theoretical study of ... a, b, and α are also parameters which need to be specified Numerical solution and concluding remarks The volume fraction equation, Eqn (40) and the velocity equation, Eqn (41) are coupled and must ... = 30o, m = 0.5, and θ∞ = 0.5 ) 514 Two Phase Flow, Phase Change and Numerical Modeling The effects of the reaction order m on the distribution of the dimensionless temperature and the heat transfer...

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... 3664-3673 540 Two Phase Flow, Phase Change and Numerical Modeling Lamberg, P.; Lehtiniemi, R & Henell, A (2004) Numerical and Experimental Investigation of Melting and Freezing Processes in Phase Change ... continuity and Navier-Stokes equations are solved with the EnthalpyPorosity and the VOF methods in order to simulate a melting and falls-off PCM and we can safely said that our model and code are ... Change and Numerical Modeling Fig shows the volume fraction, F In this figure, change of free surface interface between gas and PCM are observed Free surface interface becomes to strech from s, and...

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... temperature and pressure (BHT and BHP) that were simulated by heat conduction and heat convection models with monitored values (Model 2005) 578 Two Phase Flow, Phase Change and Numerical Modeling ... design and installation of such systems The performances of two types of TES, which use ice and paraffin waxes, were analyzed Ice storage systems 562 Two Phase Flow, Phase Change and Numerical Modeling ... 0360-5442 Incropera, F and DeWitt, D, (1996), Fundamentals of Heat and Mass Transfer, John Wiley & Sons., ISBN 0-471-30460-3, New York 564 Two Phase Flow, Phase Change and Numerical Modeling Kauranen,...

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