frontiers in heat and mass transfer journal
MÔ HìNH HOá QUá TRìNH TRAO ĐổI NHIệT ẩM TRONG MáY ấP TRứNG GIA CầM Modeling of heat and mass transfer in chicken egg incubators
Ngày tải lên: 28/08/2013, 08:31
Heat and Mass Transfer in Porous Media pdf
... boiling in heated minichannels. Int. J. Heat Mass Transf. 46(16), 2957–2965 (2003) 32. Chang, K.H., Pan, C.: Two-phase flow instability for boiling in a microchannel heat sink. Int. J. Heat Mass ... microchannel heat sink. Int. J. Heat Fluid Flow 30(6), 1171–1182 (2009) 21. Huh, C., Kim, M.H.: Pressure drop, boiling heat transfer and flow patterns during flow boiling in a single microchannel. Heat ... Microchannel Heat Sinks. J. Heat Transf. 129(10), 1341–1351 (2007) 37. Brutin, D., Tadrist, L.: Pressure drop and heat transfer analysis of flow boiling in a minichannel: in uence of the inlet condition...
Ngày tải lên: 31/03/2014, 16:20
CONVECTIVE HEAT AND MASS TRANSFER ppt
... Notation xxi w Velocity in z direction in Cartesian coordinates, in θ direction in cylindrical coordinates, or in ϕ direction in spherical coordinates (m/s); work per unit mass ( W/kg ) X Mole fraction Y ... of thermal and mass transfer boundary conditions can be encoun- tered in practice. Standard thermal and mass transfer boundary condition types are often used in theoretical models and experiments, ... (m) l ent,ma Mass transfer entrance length (m) l ent,th Thermal (heat transfer) entrance length (m) l M Turbulence mixing length ( m) l M, ma Turbulence mixing length f or mass transfer (m) l heat Heated...
Ngày tải lên: 30/03/2014, 19:20
heat and mass transfer
... corresponds to that of heat conduction, whilst mass transfer in a flowing fluid, known for short as convective mass transfer corresponds to convective mass transfer. Mass transfer by diffusion and convection ... of Heat Transfer , in which he introduced dimensionless groups for the first time. Further important investigations included heat transfer in film condensation, cross current heat transfer and ... discussed in detail in the following sections. Heat exchanger design mainly consists of two tasks: 1. Calculating the heat flow transferred in a given heat exchanger. 2. Design of a heat exchanger...
Ngày tải lên: 02/04/2014, 15:27
fundamentals of heat and mass transfer
... temperatures and heat input rate for an internally reversible heat engine. Thermal resistances separating heat engine from source and sink under clean and fouled conditions. Find: 1. Efficiency and power ... involving fluid flow), the in ow and outflow terms also include energy (thermal and mechanical) that is advected (carried) by mass entering and leaving the control volume. For instance, if the mass ... applying energy conserva- tion at an instant in time, 1 as discussed in Section 1.3.1. Utilizing the definition of a thermal resistance, the heat transfer rates into and out of the heat engine...
Ngày tải lên: 02/04/2014, 15:51
fundamentals of momentum, heat, and mass transfer 5th edition
... becomes dP dy e y ẳrge y Integrating between C and D in the manometer fluid, we have P atm À P C ẳr m gd 2 and then integrating between B and A in the tank uid, we obtain P A P B ẳr T gd 1 2.1 Pressure Variation in ... Approach Of specific interest in momentum transfer is the description of the point-to-point variation in the pressure. Denoting the directions east and north in Figure 1.5 by x and y, respectively, ... the heating, determine th e velocity, v, in the stack. The fluid v elocity entering the heating chamber may be ne glected and the chimne y is immersed in fluid of density r 1 . V r 2 r 1 r 1 L 2 Heatin g ...
Ngày tải lên: 02/04/2014, 15:51
incropera fundamentals of heat and mass transfer
... thickness and thermal conductivity of a single pane window and the air space of a double pane window. Representative winter surface temperatures of single pane and air space. FIND: Heat loss ... COMMENTS: The heat loss and related costs are unacceptable and should be reduced by insulating the steam line. PROBLEM 1.5 KNOWN: Inner and outer surface temperatures of a glass window of prescribed ... container. Inner and outer surface temperatures. FIND: Heat flux through container wall and total heat load. SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) Negligible heat transfer...
Ngày tải lên: 02/04/2014, 15:52
momentum, heat, and mass transfer fundamentals
... Injection of dye in pipe flow1* laminar (top) to turbulent (bottom) Laminar flow is dominated by viscous forces and turbulent flow is dominated by inertial forces, In a plot of point ... face cream, etc. involves flow of complex fluids - frequently with the accompanying problems of heat transfer and sometimes mass transfer. This large and very interesting area of fluid ... of finite thickness with uniform initial temperature and convective resistance at surfaces Figure 7.4.2-3 Centerline temperature for unsteady-state heat transfer in an infinite cylinder...
Ngày tải lên: 02/04/2014, 15:53
Fundementals of heat and mass transfer kotandaraman
... resulting in increased heat flow. It may be shown that the resistance actually decreases and then increases in certain cases. The thickness upto which heat flow increases and after which heat ... to obtain the following differential equations in the cylindrical and spherical coordinate systems. Here it has to be noted that the area value changes in the coordinate directions. In cylindrical ... also increases rapidly with temperature. 1.3 COMBINED MODES OF HEAT TRANSFER Previous sections treated each mode of heat transfer separately. But in practice all the three modes of heat transfer...
Ngày tải lên: 08/04/2014, 10:55
Heat and Mass Transfer Modeling and Simulation Part 1 pptx
... simulation results (a) and experiments (b) HEAT AND MASS TRANSFER – MODELING AND SIMULATION Edited by Md Monwar Hossain Heat and Mass Transfer – Modeling and Simulation 8 5 101 ... description and analysis of heat and mass transfer processes in a fin -and- tube air heater. Hydrogen production by steam reforming and the process intensification strategies are discussed in chapter ... and mass transfer processes for a variety of industrial applications. The research papers provide information and guidelines in terms of theory, mathematical modeling and experimental findings...
Ngày tải lên: 19/06/2014, 10:20
Heat and Mass Transfer Modeling and Simulation Part 2 ppt
... reactants, Heat and Mass Transfer – Modeling and Simulation 30 does not only have influence in terms of mass transfer limitations, but in kinetic and ohmic ones due to an excess of insulator ... collects the corresponding values for the hydrogen mass transfer. Heat and Mass Transfer – Modeling and Simulation 28 3.2.1 Influence of the Teflon percentage in the microporous layer ... Heat and Mass Transfer – Modeling and Simulation 26 circuit constant phase element and resistance, related to the charge transfer processes (kinetic), and another parallel mini-circuit...
Ngày tải lên: 19/06/2014, 10:20
Heat and Mass Transfer Modeling and Simulation Part 3 pot
... air-flow and the condensate-film (Fig. 3). Fig. 3. Heat and mass transfer phenomenon around a fin-tube As the fins spacing is very weak regarding the fins height and length, heat and mass transfer ... equation in the fin surface (Eq. 41) and the heat and mass transfer equations for the condensate-film (Eqs. 35 and 37). In our model, the simultaneous influence of the local speed and heat transfer ... the relative humidity and the fin temperature [Lin & Jang , 2002, Liang et Numerical Analysis of Heat and Mass Transfer in a Fin -and- Tube Air Heat Exchanger under Full and Partial Dehumidification...
Ngày tải lên: 19/06/2014, 10:20
Heat and Mass Transfer Modeling and Simulation Part 4 docx
... zero when going up the inlet and outlet or the upper and lower fin edges, and is also minimal near the tube surface. 2.4.2 Solving heat and mass transfer equations The heat and mass transfer ... straight fin with combined heat and mass transfer, ASHRAE transactions, Part 1, 100, 367-374. Numerical Analysis of Heat and Mass Transfer in a Fin -and- Tube Air Heat Exchanger under Full and Partial ... other hand, the influence of u i on the heat transfer is such as the total heat rate increase with increasing the flow regime. In the case of an ideal fin, the heat transfer increasing is...
Ngày tải lên: 19/06/2014, 10:20
Heat and Mass Transfer Modeling and Simulation Part 5 pdf
... straight tube. In this study, nitrogen was used as a driving gas and carrying gas with an inlet pressure of 1.4 and 1.6 MPa for the heating gas and powder carrying gas separately. Heating gas temperature ... activity. Heat and Mass Transfer – Modeling and Simulation 84 Fig. 14. Effects of V in , n on X at different T in . At lower inlet velocity such as V in =0.1m·s -1 , increment of methanol ... Heat and Mass Transfer – Modeling and Simulation 76 Fig. 8. Morphology of the cold sprayed coatings before and after steam reforming. Process Intensification of Steam Reforming...
Ngày tải lên: 19/06/2014, 10:20
Heat and Mass Transfer Modeling and Simulation Part 6 pptx
... describing the natural and forced convective heat and mass transfer regimes for nanofluids flowing in semi-infinite geometries, i.e. external boundary layer flows along Heat and Mass Transfer ... nanofluids strongly influences the boundary layer thickness by modifying the viscosity of the resulting mixture leading to variations in the mass transfer in the vicinity of walls in external boundary-layer ... the following U-velocity and temperature polynomial distributions depending mainly upon the dynamical parameter: Heat and Mass Transfer in External Boundary Layer Flows Using Nanofluids...
Ngày tải lên: 19/06/2014, 10:20
Heat and Mass Transfer Modeling and Simulation Part 7 doc
... Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure using nanofluids. Int. J. Heat Mass Transf. Vol. 46 pp.3639-3653. Heat and Mass Transfer – Modeling and Simulation ... confined and submerged impinging jet heat transfer using Al2O3-water nanofluid, International Journal of Thermal Sciences, Vol. 48, pp.401-411 Pak B. C., Cho Y. I., Hydrodynamic and heat transfer ... the gravity m.s -2 h heat transfer coefficient W.m -2 .K -1 Heat and Mass Transfer – Modeling and Simulation 116 Wang, X Q. &, Mujumdar, A.S. (2007). Heat transfer characteristics...
Ngày tải lên: 19/06/2014, 10:20
