heat mass and momentum transfer in fluid flow

... Taylor-Couette Flow and Melt Flow in Czochralski Crystal Growth Many important engineering flows involve swirl or rotation, for example, the flows in combustion, turbomachinery and mixing tanks In this ... according to a certain lattice velocity model Since all lattice velocity models are regular and defined in the Cartesian coordinates, the standard LBM is based on the Cartesian coordinate system and ... (2.26) (2.27) where ε=δt and D ≡ (∂ t + e β ⋅ ∂ β ) , β=x,y Retaining terms up to O(ε2) in Eqs (2.26) and (2.27) and substituting into LBE Eq (2.6) results in the following equations: O(ε0): (f...

Ngày tải lên: 11/09/2015, 14:36

... 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 ... maximal early in the morning, just before the sap begins to flow During the day, stem width shrinks rapidly until sap flow reaches its maximum level and until air humidity increases again Stem width ... 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...

Ngày tải lên: 08/08/2014, 14:20

... YA and MA in spring wheat lands, respectively, and 46 and 20 times in corn lands, respectively Soil Zn concentration at WA was and 1.5 times higher than the contents found at YA and MA in spring ... Ž1994., who, in their pot experiment, concluded that the contents of Cd and Zn in spring wheat parts Žstraw and grain increased with increasing the two metal concentrations in sandy soils The ... Cd and Zn in spring wheat plant were higher in straw than in grain by factors 3᎐7 and 1.5᎐2 for Zn and Cd, respectively, and Zhou et al Ž1994., who confirmed that the order of the two element transfer...

Ngày tải lên: 15/03/2014, 23:22

... aggregation, and help them regain normal function following stress [41] In this study, HSP 21 levels increased in both SA-treated and control leaves during heat stress (Fig.7) Under severe heat stress, ... spraying with a 0.1 mM solution of SA decreased thiobarbituric acidreactive substances and relative electrolyte leakage in young grape leaves under heat stress, indicating that SA can induce intrinsic ... temperature, spraying SA did not induce significant (P < 0.05) changes in Pn, Ci and gs in the grapevines (Fig 1) When these plants were heat stressed at 43°C for h, Pn and gssharply declined while...

Ngày tải lên: 12/08/2014, 03:21

... investigate the divergence of duplicated genes, and several studies using such data have already provided intriguing new insights into gene fate after duplication In yeast, for instance, Gu and ... Set containing the non-anchor point duplicates of Set Set containing the anchor points of Set assumed to have been created by 1R/2R Set containing the non-anchor points of Set Materials and methods ... subdivided into two sets of anchor and non-anchor points (see Materials and methods) Differences in expression divergence between anchor points and non-anchor points were evaluated by comparing their...

Ngày tải lên: 14/08/2014, 16:21

... augmented heat transfer and friction in asymmetrically heated rectangular ducts with ribs on the heated wall in transverse, inclined, V-continuous and V- discrete pattern Int Journal of Heat Mass Transfer ... accuracy In a recent study, Cho et al [12] investigated the effect of a gap in the inclined rib on heat transfer in a square duct and reported that a gap in the inclined rib accelerates the flow and ... K.R Gandhi B.K and Saini J.S “Investigation of heat transfer and friction using inclined discrete ribs on absorber plate of a solar air heater” 19th National & 8th ISHMT-ASME Heat & Mass Transfer...

Ngày tải lên: 05/09/2013, 16:10

... 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, ... Heat and Mass Transfer Editorial Board D Mewes F Mayinger L.P Yarin · A Mosyak · G Hetsroni Fluid Flow, Heat Transfer and Boiling in Micro-Channels 123 L.P Yarin Technion-Israel Institute ... 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...

Ngày tải lên: 02/04/2014, 15:51

... Forchheimer term f fluid fluid fluid part i, j grid node 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 ... 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 ... to heat and mass transfer; 22 Chapter Introduction To implement the Ochoa-Tapia and Whitaker’s stress jump conditions for the flow, heat and mass transfer in porous /fluid coupled domains, and...

Ngày tải lên: 12/09/2015, 21:13

... 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 ... 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, ... 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...

Ngày tải lên: 28/08/2013, 08:31

... TRANSFER, AND FLUID FLOW The information contained in this handbook is by no means all encompassing An attempt to present the entire subject of thermodynamics, heat transfer, and fluid flow would ... the heat transferred per unit mass q Q m (1-16) where: q = heat transferred per unit mass (Btu/lbm) Q = heat transferred (Btu) m = mass (lbm) Example: Determine the heat transferred per unit mass ... converted into an equivalent amount of heat and that heat could be converted into work EO 1.8 DEFINE the following: a Heat b Latent heat c Sensible heat d Units used to measure heat EO 1.9 DEFINE the...

Ngày tải lên: 22/10/2013, 10:15

... TRANSFER, AND FLUID FLOW The information contained in this handbook is by no means all encompassing An attempt to present the entire subject of thermodynamics, heat transfer, and fluid flow would ... the heat transferred per unit mass q Q m (1-16) where: q = heat transferred per unit mass (Btu/lbm) Q = heat transferred (Btu) m = mass (lbm) Example: Determine the heat transferred per unit mass ... Port Royal Rd., Springfield, VA 22161 Order No DE92019789 THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW ABSTRACT The Thermodynamics, Heat Transfer, and Fluid Flow Fundamentals Handbook was developed...

Ngày tải lên: 17/03/2014, 15:00

... removing decay heat from a reactor core Rev Page ix HT-02 Heat Transfer Intentionally Left Blank HT-02 Page x Rev Heat Transfer HEAT TRANSFER TERMINOLOGY HEAT TRANSFER TERMINOLOGY To understand and ... typical combined heat transfer situation Figure Combined Heat Transfer Using the figure representing flow in a pipe, heat transfer by convection occurs between temperatures T1 and T2; heat transfer ... exchanger Page HT-02 HEAT TRANSFER TERMINOLOGY Heat Transfer Convective Heat Transfer Coefficient The convective heat transfer coefficient (h), defines, in part, the heat transfer due to convection...

Ngày tải lên: 17/03/2014, 15:00

... Page x Rev Fluid Flow CONTINUITY EQUATION CONTINUITY EQUATION Understanding the quantities measured by the volumetric flow rate and mass flow rate is crucial to understanding other fluid flow topics ... consideration in certain applications that involve heat transfer to the fluid Laminar Flow Laminar flow is also referred to as streamline or viscous flow These terms are descriptive of the flow because, in ... TRANSFER, AND FLUID FLOW The information contained in this handbook is by no means all encompassing An attempt to present the entire subject of thermodynamics, heat transfer, and fluid flow would...

Ngày tải lên: 17/03/2014, 15:00

... 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 ... 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 ... epoxy paint and the four edges were covered with aluminium tape, allowing vapour transfer only in the main face The Evaluation of Hygroscopic Inertia 31 Fig Mass variation stable cycle in MBV...

Ngày tải lên: 31/03/2014, 16:20

... considered 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 ... Mass and Heat Transfer in Liquid Films Tubes and Boundary Layers 3.1 Convective Mass and Heat Transfer Equations and Boundary Conditions 3.1-1 Mass Transfer Equation Laminar Flows ... HYDRODYNAMICS, 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...

Ngày tải lên: 02/04/2014, 15:52

... 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 ... mechanisms of mass and heat transfer in fluids and solids and application in the estimation and correlation of mass and heat transfer coefficients To achieve these goals we use the following methods: ... 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...

Ngày tải lên: 02/04/2014, 15:52

... 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 mass ... 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

... three-dimensional 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 ... useful information about the flow and heat transfer characteristics in the plain fin -and- tube heat exchangers Tsai and Sheu (1998) also offered us some physical insights into the fluid structure in ... greater heat and mass transfer rate than the in- line tube arrangement Mendez et al.(2000) examined the effect of fin spacing on a single cylinder heat exchanger through dye injection technique and...

Ngày tải lên: 11/09/2015, 16:02

... channel and consumes nutrients from culture medium flowing through the channel A three-dimensional numerical flow model, incorporating mass transport, was used to simulate the internal flow and mass ... with ࠫ numerical investigations of fluid flow and mass transfer in microchannel bioreactors for single-culture systems with single cell-type, randomly distributed co-culture and micropatterned ... plasma flow rate and the initial oxygen tension Increasing the flow rate and/ or the inlet oxygen tension would cause improved oxygen transport to cells in the bioreactors, and result in larger...

Ngày tải lên: 12/09/2015, 21:13

... 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 ... kinetic nature of LBM introduces some important and even unique features, such as the easy modeling of interactions among the fluid and porous medium Originally, in LBM simulations only mass and ... OF 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