... work proposes a modified diffusion synthetic acceleration model to improve the convergence of radiative transfer calculation in participating media with diffusely reflecting boundary. This model adopts the P 1 diffusion approximation to rectify the scattering source term of radiative transfer equation...

...K. N’Wuitcha; M. Banna; S. W. Igo; B. Zeghmati; K. Palm; X. Chesneau This study reports the results on a numerical investigation of the depollution of smokes produced by the incineration of household wastes in a cylindrical furnace. Transfers are described by double-diffusive mixed convection...

... heat loss and spectral radiation intensities were investigated experimentally for oxygen-enhanced normal and inverse laminar ethane diffusion flames with increasing heat release rates. The oxygen mole fraction in the oxidizer was varied as 21%, 30%, 50%, and 100% with coflowing normal and inverse flame...

...Kleber Vieira de Paiva; Marcia Barbosa Henriques Mantelli; Leonardo Kessler Slongo This work presents a theoretical and experimental analysis of a copper mini heat pipe (MHP), fabricated from a sandwich formed between cylindrical wires and flat plates, which are welded by means of diffusion process...

...P. Srinivasan; S. Mark Spearing Understanding the mechanisms of thermally driven resonance is a key for designing many engineering and physical systems especially at small scales. This paper focuses on the modeling aspects of such phenomena using the classical Fourier diffusion theory. Critical...

...Arpit Mittal; Sandip Mazumder A generalized form of the ballistic-diffusive equations (BDEs) for approximate solution of the Boltzmann Transport equation (BTE) for phonons is formulated. The formulation presented here is new and general in the sense that, unlike previously published formulations...

... ). Utilizing the results for Nu in the high Ra m range, a correlation is proposed between Nu and Ra C for Darcy numbers 10 − 6 ≤ Da ≤ 10 − 2 , encompassing the non-Darcy flow regime. 19 04 2010 13 01 2011 08 03 2011 08 03 2011 diffusion drag flow through porous media heat...

... and the intensification of mass transfer caused by the Marangoni effect, the heat transfer characteristics of pseudo-dropwise condensation are tentatively formulated. The model involved an analysis of the diffusion process in the vapor boundary layer along with the heat transfer process through the condensate drops...

... computational fluid dynamics convection diffusion distortion laminar flow non-Newtonian flow non-Newtonian fluids pipe flow viscosity Bingham fluid viscous dissipation convective heat transfer generalized Brinkman number duct flows The Bingham rheological model is frequently used...

... of practical importance. Predictions of total thermal resistance for wire/substrate and particle/substrate combinations are made for the entire range of Knudsen number, with an emphasis on resolving transport in the mesoscopic regime where ballistic-diffusive mechanisms operate and analytical expressions...

...Alexander Raymond; Srinivas Garimella Adsorption heat pumps and chillers (ADHPCs) can utilize solar or waste heat to provide space conditioning, process heating or cooling, or energy storage. In these devices, intraparticle diffusion is shown to present a significant mass transfer resistance...

.... Treating food material as a porous medium, heat and mass transfer inside such material during its thermal processing is described using equations for mass and energy conservation that include binary diffusion, capillary and convective modes of transport, and physicochemical changes in the solid matrix...

...I. V. Shevchuk The convective diffusion of feeding culture and the effect of fluid shear stress on endothelial cells are frequently investigated in cone-and-plate devices. Laminar fluid flow and heat and mass transfer in a cone-and-plate device, with cone apex touching the plate/disk, were...

... and clarifying the combined roles of β and moisture diffusivity ( D = 1 × 10 − 8 – 1 × 10 − 5 m 2 / s ) on the mass transfer behavior, are obtained for practical applications. It is shown that the blockage augments the friction coefficients ( C f ) and Nusselt numbers (Nu) on the complete cylinder surface, where...

... diffusion flow instability flow through porous media fluid oscillations Helmholtz equations refrigerators viscosity The study of convection processes in porous media is a well-developed field of investigation because of its importance to a variety of situations, for example, thermal insulation...

... the diffusion-limited cluster-cluster aggregation algorithm in order to ensure a fractal dimension close to what is usually found with aggregates of silica nanoparticles. In this part we aim at identifying the radiative properties of the samples from the experimental data derived from optical measurements...

...H. Lan; B. F. Armaly; J. A. Drallmeier A simulation of two-dimensional turbulent forced convection in a plane asymmetric diffuser with an expansion ratio of 4.7 is performed, and the effect of the diffuser angle on the flow and heat transfer is reported. This geometry is common in many heat...

... film evaporation diffusion triple line Evaporation from a meniscus serves as the basic mechanism in many two-phase cooling devices such as heat pipes, thermosyphons, vapor chambers, two-phase cold plates, and capillary pumped loops. Thin-film evaporation, which takes place near a solid...

...Zhenjin Zhu; Jin Ho Zong; Chul B. Park; Manoj Choudhary This paper presents a numerical study to characterize the effect of loss of blowing agents on the thermal insulation properties of polystyrene foams. In this study, a transient cell-to-cell diffusion model is developed to predict the loss...

...M. Eswaramurthi; P. Kandaswamy The buoyancy-driven transient double-diffusive convection in a square cavity filled with water-saturated porous medium is studied numerically. While the right and left side wall temperatures vary linearly from θ a to θ o and θ o to θ b , respectively, with height...