Showing papers in "International Communications in Heat and Mass Transfer in 1986"

TL;DR: In this article, the authors present an analysis for the conception d'un systeme de refroidissement extremement efficace de circuits integres capables de dissiper plus de 1000 W/cm 2 en maintenant la temperature a un niveau modere acceptable for le fonctionnement des transitions.

TL;DR: In this article, a linear stability analysis for the problem of double diffusion in a horizontal layer of sparcely packed porous medium is presented and the critical parameters of the problem are determined and the boundaries defining the regions of direct and overstable modes are obtained.

TL;DR: In this paper, the effect of vertical partitioning on convection in air-filled rectangular enclosures was studied and it was found that placing a partition midway between the vertical walls of an enclosure produces the greatest reduction in heat transfer and often compares favorably with fully insulating the enclosure with a porous material.

TL;DR: In this paper, the authors describe a processus conduisant a la separation du fluide ou une partie a haute temperature and a basse temperature dans un tube de Hilsch (tube a tourbillon), autour d'un cylindre dans an ecoulement transversal ou dans a jet heurtant a plaque.

TL;DR: In this paper, the problems of fully-developed flow in a rectangular and an annular packed bed are re-examined based on the Van Driest mixing length theory, and a composite solution for the axial velocity is constructed from the inner and outer solutions based on a multiplicative rule instead of the additive rule.

TL;DR: In this article, the minimum of enthalpy exchange irreversibility (EEI) as a selective criterion in heat exchanger design is considered, and the concept is applied in the core sizing procedure of a compact cross-flow heat exchange for gas-to-gas application.

TL;DR: In this paper, it was shown that the appropriate dimensionless parameters are the generalized Rayleigh number and the power-law index n for natural convection to power law fluids of high Prandtl number.

TL;DR: In this paper, the interaction region of a circular jet with initially laminar boundary layers is studied. But the strength of the interaction is considerably less for the circular jet than for the plane jet.

TL;DR: In this article, heat transfer in laminar forced convection to non-Newtonian fluids in thermally developing flow inside circular tubes and parallel plate ducts with prescribed wall heat flux is solved exactly.

TL;DR: In this article, the effects of natural convection and porous media ( spherical glass balls) on solidification and fluid motion were investigated for the freezing of water and of water saturated porous media.

TL;DR: In this article, the transverse curvature effects on axisymmetric free convection boundary layer flow of water at 4°C past a slender vertical cone were analyzed for a Prandtl number of 11.4.

TL;DR: In this paper, an integral method was used to study the transverse curvature effect on free convection of a Darcian fluid about a vertical cone with a power-law variation of wall temperature.

TL;DR: In this paper, the authors developed a new model for calculating the rate of heat transfer from a particle to a surrounding gas, which assumes no relative motion between the particle and gas, and is applicable at all Knudsen numbers.

TL;DR: In this article, a finite difference technique was used to study Laminar natural convection over a horizontal isothermal square cylinder situated in an infinite fluid medium, and it was shown that boundary layer separation past the sharp edges of the upper horizontal surface of the square cylinder is in the range of Rayleigh number based on the one side length of a square cylinder greater than 5×103.

TL;DR: In this article, the melting behavior of horizontal tubes with and without axial fins was investigated experimentally, where the fluid flow behavior at the interface was drawn to the Gortler vortices and the mean heat transfer rates were correlated, depending on the different investigated convection schemes.

TL;DR: In this paper, numerical calculations based on finite difference approximations are carried out to assess the thermal response of a composite slab due to a time-varying incident heat flux.

TL;DR: In this article, the effects of surface roughness, saturation pressure and polymer concentration on boiling heat transfer were studied and the results were compared with Rohsenow's correlation, and the authors concluded that the results showed that the effect of the additive on smooth and rough aluminium surfaces having effective cavity size within the range as predicted by Hsu model.

TL;DR: A tubeless flat-plate collector has no tubes welded or pressed to absorber plate as discussed by the authors, it is merely two-parallel plates made of galvanized steel, and welded to each other.

TL;DR: In this paper, experimental studies were conducted for two-phase crossflows in horizontal tube bundles at various mass fluxes and local flow qualities, and the results showed that the difference between the heat transfer performance for a heated tube in an infinite pool and in a heated or non-heated bundle can be explained in terms of different flow field geometry and thermal environment.

TL;DR: In this paper, the nonuniform porosity effect on steady one-dimensional heat conduction in a packed bed between parallel plates, concentric cylinders and concentric spheres at different temperatures is considered.

TL;DR: In this paper, experimental data for mixed convection heat loss from spheres was collected over a range of angles between forced and natural convection flows, and the results indicate that opposing flow must be treated differently from cross and aiding flows.

TL;DR: In this paper, the problem of conjugate mixed convection heat transfer from a vertical plate fin embedded in a porous medium is studied numerically for various fluids and approximate solutions for the problem are based on the local nonsimilarity method.

TL;DR: In this paper, an analysis of the effects of the permeability parameter on the flow of water at 4°C through a very porous medium is made, and a family of solutions of the coupled non-linear equations is derived numerically.

TL;DR: In this paper, the mass and momentum transport of liquid films in parallel two-phase flow may be dominated by form drag forces exerted on the interfacial waves rather than shear forces.

TL;DR: In this paper, a falling sphere viscometer was used to determine the steady low shear viscosity of intermediate concentrations of highly viscoelastic fluids (polyacrylamide, 1000 and 500 ppm solutions).

TL;DR: In this article, a semi-empirical equation of heat eddy diffusivity in terms of friction drag reduction ratio and Weissenburg number is presented for aqueous solutions of polyacrylamide (Separan AP-273).

TL;DR: In this article, a continuous foam fractionation column in the simple mode is used to treat the dilute aqueous solutions of a surface active solute, benzyl-dimethyl-cetylammonium chloride.

TL;DR: In this paper, a methodology to simulate numerically the heat or mass transfer processes in solids of irregular shapes is proposed, which can be applied to the study of these processes.

TL;DR: In this paper, a number of studies of pool boiling of aqueous polymer solutions have been reported, but none of these studies present adequate rheological information to clearly identify the fluid.

TL;DR: In this article, a new model for mass transfer in the laminar wake region formed by closely spaced drops is proposed, which can be used to calculate the time-dependent local ambient conditions experienced by interacting drops falling on a verticle trajectory.