thermal heat transfer and flow parameters

... IN ENERGY AND NUCLEAR SCIENCE AND TECHNOLOGY Pressure drop, heat transfer and flow pattern maps inside smooth and enhanced tubes during convective boiling and condensation of R134a and R1234ze ... drop, heat transfer and flow pattern maps inside smooth and enhanced tubes during convective boiling and condensation of R134a and R1234ze b Field (of basic research/of application); heat transfer ... R1234yf and R1234ze Intermittent flow Annular flow Mist flow Slug + stratified wavy flow Slug Dryout black : R134a green : R1234yf red : R1234ze Trang 23Heat transfer coefficient: Four heat transfer

Ngày tải lên: 25/01/2021, 22:36

... 8NUMERICAL HEAT TRANSFER AND FLUID FLOW Trang 9 INTRODUCTION 1.1 SCOPE OF THE BOOK Importance of heat transfer and fluid flow This book is concerned with heat suid mass transfer, uid flow, chemical ... Mechanics and Heat Edition es of Regenerative Heat Transfer NUMERICAL HEAT TRANSFER AND FLUID FLOW Trang 3Library of Congress Cataloging in Publication Data Patankar, S¥ ‘Numerical heat unser and ... Pluid Mechanies and leat ‘omputatjonal Heat Transfer ‘chan Numerical Heat Trensfor and Fluid Flow Heinrich, The Finite Element Method: Basic Concepts und plications Sst, Numerical Heat Transfer PROCEEDINGS

Ngày tải lên: 05/05/2018, 08:45

... corresponding to 0.012 and 0.016 kg s1 were (Tbp= 75.02 and 78.75C) and (Tab= 87.50 and 93.03C) (see Table 1a), and (Tab= 70.25 and 74.50C) and (Tbp= 91.25 and 94.02C) (seeTable 1b), respectively The ... used the cross-corrugated absorbing plate and bottom plate to enhance the turbulence and the heat transfer rate inside the air flow channel and tested its thermal perfor-mance[10,11] The work title ... conventional flat-plate solar air heater has been investigated for heat transfer efficiency improvement by introducing forced convection[22,23], extend-ing heat transfer area [24,25] and increasing air turbulence

Ngày tải lên: 13/01/2020, 11:50

... average heat transfer rate and heat transfer performance of the countercurrrent configuration were 6.8% and 10%‒15% higher, respectively, than those of the parallel flow The average heat transfer ... temperature difference (LMTD) and the average heat transfer rate, as represented by Equation (7): The hot-side heat transfer coefficient, h h and the cold-side heat transfer coefficient, h c were ... structure and flow configuration are shown in Figure 3 The flow configuration was set for a counterflow to obtain a smaller approach temperature Once the heat transfer plates were bonded, inlet and

Ngày tải lên: 02/11/2022, 11:34

... ADVANCES 2, 042150 (2012)Momentum transfer and flow induction in a dielectric barrier discharge plasma actuator T Abe,1M Takagaki,2and K Yamada1 1Institute of Space and Astronautical Science/JAXA, ... (glass-fiber-reinforced epoxy) and has a chord, span, and thickness of 72, 200, and 1.8 mm, respectively Identical pieces of copper foil with a chord, span, and thickness of 15 mm, 100 mm, and 40μm, respectively, ... momdiffer-entum transfer during the increasing and decreasing phases of the high-voltage input The second region was an extension of the first one and was formed through the inertia of the flow originating

Ngày tải lên: 04/12/2022, 15:35

... Fang20discussed the Sakiadis flow with nonlinear Rosseland thermal radiation In another paper Pantokratoras and Fang21studied the effects of nonlinear Rosseland thermal radiation in Blasius flow Cortell22investigated ... Cortell22investigated the fluid flow and nonlinear radiative heat transfer over a stretching sheet A numerical study of nonlinear radiative heat transfer in the flow of a nano fluid due to solar ... thermal conductivity, cp is the specific heat at constant pressure and qris the radiative heat flux The corresponding boundary conditions for the flow and heat transfer problem are u= U, v = 0, w

Ngày tải lên: 04/12/2022, 15:36

... Prandtl number, A w is the heat transfer surface area, Q is the flow rate, and L is the length of channel No slip boundary condition (2.13) for velocity and constant heat fluxboundary condition ... theirhydrodynamic and thermal performances The total streamwise form dragand skin friction are respectively calculated by Eqs (2.15a) and (2.15b): where V represents the volume of the computational domain and ... area/volume goodness factor means smaller heat transfer surface area/volume under a given pumping power and fluid,resulting in a smaller and lighter heat exchanger matrix Trang 92.3 Numerical

Ngày tải lên: 10/09/2015, 09:11

... pressure loss and heat transfer capacity for Case 2 (h/D = 10%, Table 4.1) For Case 2C (Dz = 0%), the heat transfer ratio Trang 12Figure 4.7: Comparison with experimental results in Burgess and Ligrani(2005)loss ... results in Burgess and Ligrani (2005) as shown in Figure 4.7 Trang 10It is found that both the trend and level of heat transfer augmentationagree basically well with that of Burgess and Ligrani (2005) ... /C f 0 first increases and then decreases with an increase of Dx For Case 2S (Dz = 15%), the heat transfer ratio Nu/Nu0 and the pressure loss C f /C f 0 both first increase and then decrease with

Ngày tải lên: 10/09/2015, 09:11

... In this section, heat transfer and flow structure over protrusions with different height ratios (h/D = 5%, 10%,15%, 20%, 25%) are presented and discussed. 5.2.1 Hydrodynamic and thermal performance ... Chapter Heat transfer over protrusions1 In this chapter, heat transfer characteristics and flow structures over protrusions in a turbulent channel ... ascertain what affects the location of the highest hydrodynamic and thermal factors, more computational runs were carried out for the flow and heat transfer over protrusion at h/D = 20% with different initial

Ngày tải lên: 10/09/2015, 09:11

... flow and heat transfer over single- and multi-row plain fin-and-tube heat exchangers The effects of fin pitch, Reynolds number, tube row number and tube arrangement on the heat transfer and flow ... incompressible flow and heat transfer in plain fin-and-tube heat exchangers, the tube arrangement, tube row numbers and fin pitch were investigated in details They found that the average heat transfer ... pitch, number of tube row and tube alignment on heat transfer characteristics of fin-and-tube heat exchanger with large fin pitch Wang et al.(1997a) studied the heat transfer and pressure drop performance

Ngày tải lên: 11/09/2015, 16:02

... MODEL OF FLUID FLOW AND HEAT TRANSFER WITH POROUS MEDIA XIONG JIE NATIONAL UNIVERSITY OF SINGAPORE 2007 Trang 2A GENERALISED LATTICE-BOLTZMANN MODEL OF FLUID FLOW AND HEAT TRANSFER WITH ... electronic and transportation cooling, drying process, porous bearing, solar collectors, heat pipes, nuclear reactors, and crude oil extraction, the characteristics of fluid flow and heat transfer ... multiple component LBE model to simulate of fluid flows with heat and mass transfer was efficient, accurate, and numerically stable Trang 311.3 Objectives and Scope of Study In this study, a numerical

Ngày tải lên: 16/09/2015, 12:42

... Double-cone blender 3D DEM Flow and heat transfer (Chaudhuri et al., 2006) Hopper 2D DEM Flow study (Cleary and Sawley, 2002) 2D CFD-DEM Flow and heat transfer 3D DEM Flow and attrition (Hare et ... Wall-to-particle heat transfer 50 3.4.3 Particle-particle heat transfer 54 3.5 Modeling of screw conveyor heater 58 3.5.1 Model parameters and numerics 58 3.5.2 Granular flow and heat transfer ... Experimental and theoretical model Flow and heat transfer study; Developed a model to simulate the flow and heat transfer non-Newtonian fluid through a single screw extruder (Gopalkrishna and Jaluria,

Ngày tải lên: 02/10/2015, 17:14

... DEM Flow and heat transfer (Chaudhuri et al., 2006) Hopper 2D DEM Flow study (Cleary and Sawley, 2002) 2D CFD-DEM Flow and heat transfer study (Kruggel-Emden et al., 2006) 3D DEM Flow ... Heat transfer across the thermal pipe is controlled by the heat transfer coefficient and a non-physical heat transfer area between two elements. For two particles and in contact, the heat transfer ... extruder Experimental and theoretical model Flow and heat transfer study; Developed a model to simulate the flow and heat transfer non-Newtonian fluid through a single screw extruder. (Gopalkrishna and Jaluria, 1992) Screw

Ngày tải lên: 07/10/2015, 10:10

... the flow patterns were categorized into three types, and characteristics of flow patterns and heat transfer are elucidated For the flows in horizontal eccentric annulus, the flow and the heat transfer ... finite-difference model Overall and local heat transfer results are obtained The physics of the flow underlying the heat transfer behavior observed is revealed by the streamline and the isotherm plots ... Convergence 3.8 Mesh Size and Time Step 40 3.9 Computation of the Overall Heat Transfer Coefficients 40 Chapter Results and Discussion for Concentric Cylinders 41 4.1 Flow Mechanics and General Patterns

Ngày tải lên: 27/11/2015, 11:12

... on heat transfer and flow behavior in a rectangular rib roughened passage” International Journal of Heat and mass transfer; 123: 675-681, 2001 [6] Lau S.C., McMillin R.D and Han J.C Turbulent Heat ... Schabacker, J., and Boles, A., “Experimental and numerical study of developed flow and heat transfer in coolants with channels with 45 degree ribs”, Int Journal of Heat and fluid flow, 20, 311-319, ... Performance of Solar air heater Proceedings of XVII National and VI ISHME/ASME Heat and Mass Transfer Conference, IGCAR, Kalpakkam India 2004; Jan 05-07 [2] Han J C Heat transfer and friction in channels...

Ngày tải lên: 05/09/2013, 16:10

... THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW OVERVIEW The Department of Energy Fundamentals Handbook entitled Thermodynamics, Heat Transfer, and Fluid Flow was prepared as an information ... present the entire subject of thermodynamics, heat transfer, and fluid flow would be impractical However, the Thermodynamics, Heat Transfer, and Fluid Flow handbook does present enough information ... J Conduction Heat Transfer, Addison-Wesley Pub Co., California Holman, J P., Heat Transfer, 3rd Edition, McGraw-Hill, New York Knudsen, J G and Katz, D L., Fluid Dynamics and Heat Transfer, McGraw-Hill,...

Ngày tải lên: 22/10/2013, 10:15

... physically connected to the heat transfer site Rev Page HT-02 CONDUCTION HEAT TRANSFER Heat Transfer CONDUCTION HEAT TRANSFER Conduction heat transfer is the transfer of thermal energy by interactions ... CONVECTION HEAT TRANSFER Heat Transfer CONVECTION HEAT TRANSFER Heat transfer by the motion and mixing of the molecules of a liquid or gas is called convection EO 1.9 Given the formula for heat transfer ... vii HEAT TRANSFER TERMINOLOGY Heat and Temperature Heat and Work Modes of Transferring Heat Heat Flux Thermal...

Ngày tải lên: 17/03/2014, 15:00

... VA 22161 Order No DE92019791 THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW ABSTRACT The Thermodynamics, Heat Transfer, and Fluid Flow Fundamentals Handbook was developed to assist nuclear facility ... Inc Rev HT THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW OVERVIEW The Department of Energy Fundamentals Handbook entitled Thermodynamics, Heat Transfer, and Fluid Flow was prepared as an information ... present the entire subject of thermodynamics, heat transfer, and fluid flow would be impractical However, the Thermodynamics, Heat Transfer, and Fluid Flow handbook does present enough information...

Ngày tải lên: 17/03/2014, 15:00

... Heat Transfer Equipment Diwekar, Batch Distillation: Simulation, Optimal Design and Control FORTHCOMING TITLES Tong and Tang, Boiling Heat Transfer and Two-Phase Flow, Second Edition BOILING HEAT ... WO-PHASE FLOW 119 3.1 Introduction 119 3.2 Flow Patterns in Adiabatic and Diabatic Flows 120 2.5 3.2.1 Flow Patterns in Adiabatic Flow 120 3.2.2 Flow Pattern Transitions in Adiabatic Flow 128 ... Two-Phase -Flow Pressure Drop Transient Two-Phase -Flow Pressure Drop 21 Critical Flow and Unsteady Flow 21 3.6.1 Critical Flow in Long Pipes 220 3.6.2 Critical Flow in Short Pipes, Nozzles, and Orifices...

Ngày tải lên: 02/04/2014, 15:22

... transient and turbulent single-phase flows; (2) heat transfer of liquids and gas flows; and (3) two-phase flows in adiabatic and heated micro-channels As indicated by Kandlikar and Grande (2002), and ... Drop and Heat Transfer in a Single-Phase Flow 33 2.3 Pressure Drop and Heat Transfer in a Single-Phase Flow Many correlations have been proposed in literature for the friction factor and heat transfer, ... flow: heat transfer 2.3 Pressure Drop and Heat Transfer in a Single-Phase Flow 37 Fig 2.22 Turbulent flow: heat transfer Reprinted from Sobhan and Garimella (2001) with permission Experimental and...

Ngày tải lên: 02/04/2014, 15:51