Showing papers in "International Journal of Heat and Mass Transfer in 1986"

TL;DR: In this article, a new general correlation for forced convection boiling has been developed with the aid of a large data bank consisting of over 4300 data points for water, refrigerants and ethylene glycol, covering seven fluids and 28 authors.

TL;DR: In this paper, the radial distribution of the recovery factor and the local heat transfer for an axisymmetric impinging air jet formed by a smooth nozzle was investigated and a correlation was obtained for the average heat transfer from the surface.

TL;DR: In this article, both experimental measurements and a theoretical model for the thermal conductivity of a consolidated mixture of two-metal powders were presented, and the authors applied the technique of volume averaging to produce working equations applicable to the general problem of thermal conduction through mixtures.

TL;DR: In this paper, an analytical and numerical study of natural convection heat and mass transfer through a vertical porous layer subjected to uniform fluxes of heat from the side is presented, which is driven by the combined buoyancy effect due to temperature and concentration variations through the porous medium.

TL;DR: In this paper, experiments have been performed to determine convection heat transfer from a single heat source and an in-line, four-row array of 12 heat sources which are flush mounted to one wall of a horizontal, rectangular channel.

TL;DR: In this article, the effect of conduction in the wall on the natural convection flow in a square enclosure has been analyzed numerically, and three separate models to account for the wall conduction are investigated: (i) the complete conjugate case in which conduction was assumed to be fully two-dimensional, (ii) a one-dimensional model in which the wall convection in the horizontal direction only, and (iii) a lumped parameter approach which assumed the solid-fluid interface temperature to be uniform.

TL;DR: In this paper, the authors studied the flow and heat transfer characteristics of laminar free convection in boundary layer flows from horizontal, inclined, and vertical flat plates in which the wall temperature T w ( x ) or the surface heat flux q w (x ) varies as the power of the axial coordinate in the form T w( x ) = T ∞ + ax n or q w = bx m.

TL;DR: In this paper, several new polymer coatings, as well as gold and silver, were evaluated for their ability to promote and sustain dropwise condensation of steam, and the results were not dependent upon the thermal conductivity of the wall.

TL;DR: In this article, the heat transfer characteristics of highly populated pin-fin arrays have been investigated for three different orientations in the gravity field: (1) horizontal fins and vertical baseplate, (2) vertical fins and horizontal downfacing base plate, and (3) vertical fin and horizontal upfacing baseplate.

TL;DR: In this paper, the characterististics of nucleate boiling with jet impingement were investigated, including the effects of velocity, subcooling, flow direction and surface condition on fully developed boiling and on the correspondence of the extrapolation of pool boiling with developed jet boiling.

TL;DR: In this paper, the authors performed an analysis for a fully-developed, forced convective flow through a packed-sphere bed between concentric cylinders maintained at different temperatures using the Brinkman model with variable permeability.

TL;DR: In this article, it is shown that the overall range of the Rayleigh number, Ra, can be divided into two subregions, called low and high, in each of which the Nusselt number behaves differently.

TL;DR: In this article, two models were developed for predicting free convection low Reynolds number turbulent flows, one based on the notion of eddy diffusivities for momentum and heat and the other based on approximations derived for the anisotropic turbulent fluxes by a suitable truncation of their conservation equations.

TL;DR: In this paper, the authors combined the explicit enthalpy method and Pham's three-level enthalhip method to obtain a diagonal capacitance matrix, which can be used to estimate the specific heat near the phase change point.

TL;DR: In this article, a theoretical analysis of the phase change process in a cylindrical annulus in which rectangular, uniformly spaced axial fins, spanning the annulus, are attached to the inner isothermal tube, while the outer tube is kept adiabatic.

TL;DR: In this article, the generalized integral transform technique is employed to reduce the original problem to a system of linear first-order differential equations, which is then solved utilizing the related complex matrix eigenvalue problem.

TL;DR: In this article, the authors investigated the effect of the velocities of the boundary layer flow over a continuously stretching surface when the velocity of the stretching surface varies arbitrarily with time and found that the skin friction, the heat transfer and the mass transfer parameters respond significantly to the time dependent stretching velocity, while the Prandtl number and the Schmidt number strongly affect the heat and mass transfer of diffusing species.

TL;DR: In this article, the authors present an analysis of the melting process in a rectangular enclosure, driven by the coupling of heat conduction in the solid phase and natural convection in the melt of the phase change material (PCM).

TL;DR: In this paper, the role of latent heat transfer, in connection with the vaporization of a thin liquid film on a tube's inside surface, in natural convection flows driven by the simultaneous presence of combined buoyancy effects of thermal and mass diffusion is investigated theoretically.

TL;DR: In this article, a numerical method of analysing film cooling with a liquid coolant is presented, where a marching procedure is employed for solution of the equations of mass, momentum, enthalpy and species conservation.

TL;DR: In this article, a numerical investigation is made of laminar mixed convection of air in a vertical channel containing a partial rectangular blockage on one channel wall, where the wall containing the blockage is assumed to be heated while the other wall is either adiabatic (asymmetric heating) or heated (symmetric) heating.

TL;DR: In this paper, an auxiliary problem is introduced in the solution of inverse heat conduction problems with geometries not fully specified, which yields accurate results for exact data, while measurement errors render the Neumann problem insoluble.

TL;DR: In this paper, the authors investigated the stability of rotating double-diffusive convection in a sparsely packed porous medium considering a non-Darcy equation and showed that the effect of rotation and porous parameter is to decrease the region of instabilities.

TL;DR: In this article, the authors introduce the concept of resonant heat transfer enhancement based on excitation of shear-layer instabilities present in internal separated flows, which is applicable both in laminar and turbulent flows.

TL;DR: In this article, a numerical algorithm for the solution of the steady-state Navier-Stokes equations in three dimensions for the problem of natural convection in a rectangular cavity as a result of differential side heating is described.

TL;DR: In this paper, an analytical study of laminar natural convection heat transfer in a rectangular enclosure horizontally divided into fluid and porous regions is described. And the Navier-Stokes equation governs the fluid motion in the fluid region, while Brinkman's extension of Darcy's law is assumed to hold within the porous region.

TL;DR: In this article, a k-e formulation based on the notion of eddy diffusivities for momentum and heat was extended to predict steady free and mixed convection flows in a strongly heated cavity of arbitrary rectangular cross-section and orientation.

TL;DR: In this article, the heat transfer and pressure drop of the cross-flow on the shell-side of staggered tube-banks, having different transversal and longitudinal pitches in the range of 1.97 ⩽ tq ⌽ 3.16 and 0.67 ⌈ t1 ⌉ 1.0, respectively, have been studied experimentally.

TL;DR: In this article, an experimental investigation on the fluid flow and local heat transfer from a square prism at angle of attack to an airstream was carried out in the range 1.1 × 104 and 5.3 × 104.