2two phase flow boiling and heat transfer in micro channels

... simulate flow and heating of granular material in rotating vessels Their study focused on the mixing and heating performance of a calciner and an impregnator, represented by a cylindrical vessel and ... Understanding the underlying mechanisms in terms of these interactions is critical if granular processing and handling technologies were to advance towards greater efficiencies and sustainability Since ... mainly triggered by and rising of fuel costs and increasing worldwide demand for energy There is much reported work on upgrading of LRC by both academia and industry with thermal drying being...

Ngày tải lên: 02/10/2015, 17:14

... simulate flow and heating of granular material in rotating vessels Their study focused on the mixing and heating performance of a calciner and an impregnator, represented by a cylindrical vessel and ... Understanding the underlying mechanisms in terms of these interactions is critical if granular processing and handling technologies were to advance towards greater efficiencies and sustainability Since ... mainly triggered by and rising of fuel costs and increasing worldwide demand for energy There is much reported work on upgrading of LRC by both academia and industry with thermal drying being...

Ngày tải lên: 07/10/2015, 10:10

... Film and jet flows, fluid flows through tubes and channels of various shapes, and flow past plates, cylinders, and disks are examined In Chapters and we analyze mass and heat transfer in plane channels, ... MASS AND HEAT TRANSFER IN CHEMICAL ENGINEERING Topics in Chemical Engineering A series edited by R Hughes, University of Salford, UK Volume HEAT AND MASS TRANSFER W PACKED BEDS by N Wakao and ... Plane straining flow: This flow can be obtained in the Taylor device, consisting of four rotating cylinders [474,475] Note that flow 2' is the same as flow 3' but in a different coordinate system...

Ngày tải lên: 02/04/2014, 15:52

... laminar, 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 ... 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, ... and heat transfer in single -phase and two -phase micro- channels, design and fabrication of micro- channel heat sinks are discussed 2.1 High -Heat Flux Management Schemes With the trend towards increasing...

Ngày tải lên: 02/04/2014, 15:51

... summarize the following results of physical interest on the velocity and temperature of the flow field and also on skin friction and the rate of heat transfer at the wall The effect of growing permeability ... scholars and presently guiding 15 Ph D scholars Now he is carrying on his Post Doc Research in MHD flow through Porous Media His major fields of study are MHD flow, Heat and Mass Transfer Flow through ... velocity and temperature of the flow field are solved employing perturbation technique and the effects of the pertinent parameters on the velocity, temperature, skin friction and the rate of heat transfer...

Ngày tải lên: 05/09/2013, 14:58

... Solar drying systems: Simulations and optimization, Agrotech Publishing Academy, Udaipur, pp 131-133 Haghighi K., Segerlind L.J, (1988), Modeling Simultaneous Heat and Mass Transfer in Isotropic ... Trans ASEA, pp 31 Husain A., Chen C.S., Clayton J T, Whitney L.F (1972), Mathematical Simulation of Mass and Heat Transfer in High Moisture Foods, Trans ASAE, pp 55-59 224 Husain A., Chen C.S., Clayton ... Chen C.S., Clayton J T (1973), Simultaneuos Heat and Mass Diffusion in Biological Material, Trans ASAE, pp 69-73 Luikov, A V (1980), Heat and mass transfer, Mir Publisher, Moscow Peebles E D,...

Ngày tải lên: 28/08/2013, 08:31

... Peixoto de Freitas 25 Two -Phase Flow and Heat Transfer in Micro- Channels and Their Applications in Micro- System Cooling Yuan Wang, Khellil Sefiane, Souad Harmand and Rachid Bennacer ... dampening of the RH variation in a room and its hygroscopicity level, which is mainly dependant on the surface finishing materials and furnishing According to the principle, a hygroscopic inertia index ... Jean-Michel Hugo and Frédéric Topin Heat and Mass Transfer in Matrices of Hygroscopic Wheels C R Ruivo, J J Costa and A R Figueiredo 187 219 245 Treatment of Rising Damp in Historical Buildings Ana...

Ngày tải lên: 31/03/2014, 16:20

... courses in mass and heat transfer in that more emphasis is placed on mass transfer and the importance of systematic analysis The course in mass and heat transfer in the chemical engineering curriculum ... chemical engineering students take this course in mass and heat transfer the spring semester of their junior year, after having courses in thermodynamics, kinetics and reactor design, and fluid mechanics ... inquiring mind to synthesis and design Early emphasis on developing model equations and studying their behavior enables the instructor to involve students in problem-based learning exercises and...

Ngày tải lên: 02/04/2014, 15:52

... State of the art in quenching In Quenching and Carburizing Proceedings of the Third International Seminar of the International Federation for Heat Treatment and Surface Engineering Edited by: Hodgson ... CHF during pool boiling of nanofluids increased even when the pool boiling heat transfer of nanofluid may decrease or remain unchanged During quench hardening process, the surface heat transfer ... silica coating over the heater surface [117] Wen and Ding observed a significant enhancement in the pool boiling heat transfer of alumina nanofluids The enhancement increases with increasing particle...

Ngày tải lên: 21/06/2014, 04:20

... variable heat flux P S Gupta and A S Gupta examined the heat and mass transfer for the boundary layer flow over a stretching sheet subject to suction and blowing Elbashbeshy and Bazid studied heat and ... conducting, and thermocapillarity on the flow and heat transfer in a laminar liquid film on a horizontal stretching sheet Mukhopadhyay 14 presented solutions for unsteady boundary layer flow and heat transfer ... magnetohydrodynamic flow and heat transfer of a viscous, incompressible, and electrically conducting fluid past a semi -in nite stretching sheet was investigated The governing continuum equations that...

Ngày tải lên: 21/06/2014, 11:20

... research in boreal forests, including research on pine and spruce in Europe [4] and on the trembling aspen (P tremuloides M.) in Canada [14] The results showed that, in each year, the sap flow density ... opposition and the temperature difference decrease with an increase in sap flow During the night, sap flow ceases, all the energy of the heating probe is dissipated by conduction in the sapwood and ... lines were drawn on each sandpapered wood plate, with their intersection in the centre of the deeper (older) ring On each line, the tree rings were measured and the mean value for each year ring...

Ngày tải lên: 08/08/2014, 14:20

... energy saving Highly efficient cooling techniques allow higher inlet temperature in the turbine systems, resulting in augmentation in efficiency, thrust and durability In a heat exchanger, the heat is ... spot remains constant, and the rounding off radius changes in the circumference coordinate), and found asymmetrical flow pattern and potential increase of heat transfer Following on, Isaev and co-workers ... with micro structure are vulnerable, as such the coating shall be replaced frequently Considering the cost of installing and maintaining, the performance benefits of riblet coating are marginal...

Ngày tải lên: 10/09/2015, 09:10

... 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 53 2.3 2.3.1 Numerical ... are employed as reference to validate the numerical results, and are obtained using the Petukhov and Gielinski correlations (Incropera and DeWitt, 2002), respectively: Cf = [1.58 ln (Re 2H ) − 2.185]−2 ... alternating direction implicit (ADI) solver as the smoother Additionally, the computational domain is decomposed into several blocks and is parallelized by Message Passing Interface (MPI) Interface...

Ngày tải lên: 10/09/2015, 09:11

... on sinusoidal grooves in turbulent channel flow In this section, all the wall shapes tested in this study will be introduced, including sinusoidal, triangular and trapezoidal grooves 3.1.1 Sinusoidal ... = 0.5 < αc which results in drag reduction) Sm/Sm0 in the wide portion increases with increasing S, and conversely Sm/Sm0 decreases in the narrow portion with increasing S This is possibly due ... difference in maximum velocity in the wide and narrow portions of the channel is much larger than that for the drag increasing cases in Figure 3.9(c) and (d) Their maximum velocity in the wide...

Ngày tải lên: 10/09/2015, 09:11

... enhancing the heat transfer Thus, reducing the recirculation region can lead to increased heat transfer rate Recirculation region will reduce skin friction and increase the form drag However, the increment ... 17.5%, and is unlikely 155 to increase further It is interesting to note that while the heat transfer characteristic is enhanced for Cases 2C.3 and 2C.4, there is a corresponding slight decrease in ... intense than that in symmetric dimple, which may be the cause of the enhancement of heat transfer 4.4.2 Mean characteristics of drag and heat transfer Since Case has higher heat transfer characteristics...

Ngày tải lên: 10/09/2015, 09:11

... 10% and 20% are compared and shown 5.2.3.1 Mean flow field In this section, the mean flow field (streamlines) based on time averaged velocity field are investigated The streamlines in the vicinity ... 20%) coincide with the impingement between vortex and protrusion wall There is more intense mixing between the center region of channel and near-wall region, and stronger vortices which impinge ... streamlines follows the surface profile of the protrusion on the wind-ward side and over the top and then join the freestream In addition, the higher protrusion tends to trigger more intense mixing...

Ngày tải lên: 10/09/2015, 09:11

Ngày tải lên: 10/09/2015, 09:11

... electronic cooling, ceramic processing, and overland flow during rainfall In thermal insulation engineering, an appreciable insulating effect is derived by placing porous material in the gap between ... number in x and y directions in inlet int interface line in reactor interface interface value l east, west, north, and south point of control volume n north w west p control volume center point; ... equations Flow and heat transfer characteristics (isothermal, streamlines and local and average Nusselt numbers) were investigated in their study 1.2.6 Forced Convective Heat Transfer in Porous-Fluid...

Ngày tải lên: 12/09/2015, 21:13

... fluid particles are defined as moving and interacting in an imagined world obtained by a CHAPTER INTRODUCTION discretization of the real world, according to a set of simplified and relevant rules ... developed in modeling flow transport in porous media In these models, the drag forces and the fluid forces were considered in the momentum equation (Tien 1990, Hsu and Cheng 1990, and Nithiarasu ... FLUID FLOW AND HEAT TRANSFER WITH POROUS MEDIA XIONG JIE B Eng HUST A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE...

Ngày tải lên: 16/09/2015, 12:42

... 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 are strongly influenced ... motion and heat- transfer processes in the annular space between eccentric cylinders when the inner cylinder is heated and rotating The overall equivalent thermal conductivity ( K eq ) is obtained ... heat and fluid flow in concentric annuli with outer cylinder rotating The overall and local heat transfer coefficients over a wide range of Rayleigh numbers and at various radius ratios are investigated...

Ngày tải lên: 27/11/2015, 11:12