Showing papers in "Letters in Heat and Mass Transfer in 1982"

TL;DR: In this paper, the problem of free convection along a vertical plane source or sink with uniform lateral mass flux in a porous medium is solved by the local non-similarity approximation.

TL;DR: In this article, an exact solution of the flow of an incompressible viscous fluid past an infinite vertical plate uniformly accelerated in the vertical direction is presented, where the presence of foreign mass is also taken into account.

TL;DR: In this article, a simple model of a mushy zone which admits of an explicit solution is proposed, based on two unknown parameters: the first determines the relation between the equilibrium temperature gradient and the mushy zones width, and the second depends upon the dendritic structure.

TL;DR: In this paper, a two-dimensional hydromagnetic free convective flow through a porous medium bounded by a vertical infinite plate is considered and the influence of various parameters entering into the problem on the velocity field is discussed.

TL;DR: In this article, it was shown that the explicit similarity solution for the binary alloy solidification problem exhibits an artificial mushy zone, where the temperature and concentration lie in the region between the solidus and liquidus curves, and a condition on the data is derived whose satisfaction will guarantee its occurrence.

TL;DR: In this paper, an approximate solution for heat conduction problems which is applicable for any arbitrary variation of thermal conductivity has been proposed, which is in excellant agreement with those obtained by the exact analytical approach.

TL;DR: The addition of small amount of soluble polymer makes the boiling behavior significantly different from that of pure water as mentioned in this paper, and the polymer additives reduce the tendency of coalescence between vapor bubbles and tend to stay on the heating surface in a relatively orderly manner.

TL;DR: In this paper, a water-saturated porous medium is contained in a vertical circular cylinder of diameter D and height H which is heated from below and cooled from above, and an isothermal two-phase zone forms above the bottom in regions of ascending convection.

TL;DR: In this article, a closed model for slug flow pattern, which permits the prediction of all slug characteristics (for given gas and liquid rates) is presented, and stability analysis indicates that there exists a preferable (narrow) frequency range, associated with minimum pressure drop, where slug pattern stabilizes.

TL;DR: In this article, it was shown that discrete particles can disperse faster than fluid particles in turbulrnt flows, even if the Lagrangian r.m.s.s velocity for discrete particles is smaller than the lognormal velocity for fluid particles.

TL;DR: In this paper, a new theoretical expression for turbulent heat and mass transport in inelastic non-Newtonian liquids has been proposed under the assumption that the Schmidt number is fairly high.

TL;DR: In this paper, an analysis of a steady two-dimensional flow of water at 4°C through a saturated porous medium bounded by a vertical, infinite and permeable plate is presented on the basis of generalized Darcy's law.

TL;DR: In this paper, a model for the calculation of effective thermal conductivity of two phase media with a single continuous phase was proposed, which is based on the Ohm's law.

TL;DR: The mechanism of Nusselt number oscillation at the junction of a straight and helical tube was examined experimentally in this paper, where the heat transfer behavior in this development region was used as the basis for heat transfer enhancement in a coil in which the curvature is repeatedly reversed.

TL;DR: In this article, the effect of vibration on heat transfer from vertical rectangular fin arrays of different fin spacings and fin lengths was investigated experimentally, and it was shown that up to a certain threshold value of the product of amplitude and frequency (15 mm/s), the imparting of vibration did not have any significant effect on heat transferred from the fin array.

TL;DR: In this article, a theoretical analysis of direct contact sensible heat transfer between two immiscible liquids in a countercurrent spray column is presented, and the non-dimensional parameters governing the heat transfer process are identified and a study of the effects of the variation of these parameters is made.

TL;DR: In this article, the entertainment by a particle laden concentric jet was theoretically determined and compared with direct measurements, where the particle enhance the mixing. But the authors did not consider the effects of particle particles on the mixing process.

TL;DR: In this paper, an experimental study of the interaction of a laminar two-dimensional thermal plume with a neigboring vertical surface is carried out to determine the nature of the buoyancy-induced flow that arises.

TL;DR: In this article, a tridimensional numerical model was used to test the validity of pulse methods to characterise the thermal properties of a fibrous non-random composit material.

TL;DR: In this article, a numerical model for predicting the performance of liquid-gas mass transfer in a rotating perforated-disc type contactor was presented, which consists of a cylindrical section situated between two 45-degree conical sections.

TL;DR: In this article, an integral method has been developed for laminar free convection under non-uniform gravity, which takes the ratio of the viscous boundary layer to the thermal boundary layer as another unknown so as to characterize the interactions between viscous and thermal diffusion processes.

TL;DR: In this article, the mass transfer due to the dispersion of discrete particles in turbulent flows is modelled through the so-called non-discrete dispersive approach (N D D A).

TL;DR: In this article, the effects of varying shear stress on the deposit in one experiment and thus obviates the need of doing several experiments as in the case of flow through tubes were studied.

TL;DR: In this article, the influence of freestream turbulence on the temperature and velocity boundary layers on a circular cylinder in cross flow is investigated and it is shown that the mean velocity field is rather unaffected by the freestrain turbulence while the mean temperature field is influenced in such a way that increases in heat transfer of order 8 − 1 10 % occur.

TL;DR: In this paper, the full Navier-Stokes equations have been solved numerically to investigate the laminar free convective heat transfer from a cone with a closed end, and it is shown that the elliptic nature of the flow contributes significantly toward the augmentation of the local heat transfer rate.

TL;DR: In this paper, the effect of nonlinear density-temperature relation on convective stability in a porous medium has been studied using normal mode technique using Brinkman and Darcy models.

TL;DR: In this paper, a modified Schmidt equation is proposed which includes the influence of a nonlinear thermal Kapitza resistance on nucleate boiling at solids immersed in liquid helium I.

TL;DR: In this article, a simple integral method has been developed for laminar film condensation on plane and axisymmetric bodies, which retains the acceleration terms in the momentum equation so as to account for the Prandtl number effect.

TL;DR: In this article, a calculation has been made on vθ, temperature distribution, Nusselt number and thermal eddy diffusivity for liquid metal turbulent heat transfer in a circular tube and the calculated results are discussed in comparison with available experimental data.