Showing papers in "International Journal of Heat and Mass Transfer in 1980"

TL;DR: In this article, a regression analysis was applied to the nearly 5000 existing experimental data points for natural convection boiling heat transfer, which can best be represented by subdividing the substances into four groups (water, hydrocarbons, cryogenic fluids and refrigerants) and employing a different set of dimensionless numbers for each group of substances.

TL;DR: In this paper, a single-phase forced convection in a circular tube containing a two-dimensional rib roughness was investigated and the authors extended the state-of-the-art by examining the effect of the rib helix angle.

TL;DR: In this paper, the Navier-Stokes and energy equations were solved using an elliptic numerical procedure for a horizontal isothermal cylinder, and the flow approach natural convection from a line heat source as Ra → 0 and laminar boundary-layer flow as Ra→ ∞.

TL;DR: Prakash et al. as mentioned in this paper developed a new gas-phase viscous, thermal and species concentration boundary layer analysis using an integral approach to analyze liquid droplet vaporization in a hot convective gaseous environment.

TL;DR: In this article, a simplified model was proposed to predict the radiance emanating from nonisothermal, variable concentration carbon dioxide and water-vapor mixtures using total transmittance data.

TL;DR: In this paper, an analytical study is performed to examine the heat and mass-transfer characteristics of natural convection flow along a vertical cylinder under the combined buoyancy force effects of thermal and species diffusion.

TL;DR: In this paper, the phase-change boundary motion of n-octadecane has been studied experimentally and analytically in a rectangular test cell suitable for photographic observations.

TL;DR: For condensation from a vapour-gas mixture flowing parallel to a plane horizontal condensing surface and normal to a horizontal tube, approximate theoretically-based equations are obtained relating the mass flux of vapour to the condense surface (condensation rate) to the free-stream and condensate surface conditions as mentioned in this paper.

TL;DR: In this paper, the authors measured the heat transfer coefficient between an electrically heated single horizontal tube and air-solid fluidized beds of glass beads, dolomite, sand, silicon carbide and alumina particles.

TL;DR: In this paper, a two-dimensional time-dependent numerical computation method has been developed to determine laminar free convection in closed cavities and forced convection, both in ducts and open cavities.

TL;DR: In this paper, the effects of axial conduction in the flat plate on the interfacial temperature are significant in the constant heat flux case, and correlated by the dimensionless parameter KD.

TL;DR: In this paper, the role of liquid viscosity in film boiling is determined by postulating the existence of a hydrodynamic boundary layer superposed on potential flow and using a perturbation technique.

TL;DR: In this article, an analysis was performed which describes the moisture migration in a slab of an unsaturated porous material for the condition that the temperature of one surface is suddenly increased to a higher value whereas the other surface is maintained constant.

TL;DR: In this paper, an experimental investigation into heat transfer in a water layer confined by two horizontal plates, heated from below and cooled from above, has been conducted and it was concluded that there exist convective motions having a scale comparable to the distance between the two plates and they make a dominant contribution to heat transfer.

TL;DR: In this paper, a regular perturbation analysis is presented for three laminar natural convection flows in liquids with temperature dependent viscosity: a freely-rising plane plume, the flow above a horizontal line source on an adiabatic surface (a plane wall plume) and the flow adjacent to a vertical uniform flux surface.

TL;DR: In this article, the instantaneous shape of the melt volume was recorded photographically and local heat transfer coefficients at the solid-liquid interface, determined from these data, were determined using the correlation of the heat transfer results in dimensionless form.

TL;DR: In this paper, the heat and mass transfer characteristics of mixed convection flow along vertical and inclined flat plates under the combined buoyancy effects of thermal and mass diffusion are analyzed. But the results for the local Nusselt number and the local Sherwood number were not analyzed.

TL;DR: In this article, an empirical formula for the beam length distribution that enables the total exchange areas to be calculated for any gas absorption model (i.e., which is not restricted to an exponential absorption law) from the view factors in a diatherm medium is proposed.

TL;DR: In this paper, the boundary-layer structure on the side walls of a rectangular cavity filled with a porous material is determined using an integral relations approach, which leads to results for the core mass flux, for core-temperature gradient and for the heat transfer characteristics which are in excellent agreement with numerical solutions of the boundary layer equations.

TL;DR: In this article, the same scaling law as that proposed by Chen and Rodi for correlating the centerline velocity and temperature of a buoyant jet discharged into a uniform temperature ambient is derived from the dimensional analysis of the general governing equations and boundary conditions, and compared with the experimental measurements.

TL;DR: In this article, the effect of buoyancy on the turbulent mixed flow of free and forced convection was investigated experimentally and theoretically and an analytical model was proposed, based upon the damping factor concept of the turbulent fluctuations due to viscous action and buoyancy force.

TL;DR: In this paper, an experimental study has been made of the local heat transfer on the plane isothermal surface in the normal impinging round hot jet of combustion products produced by a rapid heating tunnel burner.

TL;DR: In this paper, a transformation of the laminar boundary layer equations, similar to the transformation of Kao et al. (1977), is presented which allows arbitrary distributions of both wall temperature and blowing.