Showing papers in "International Journal of Heat and Mass Transfer in 1964"

TL;DR: In this paper, a simplified scheme for the calculation of pressure drop during the circulation of a two-phase mixture of boiling water and steam is given, based on the experimental result of the boiler circulation research sponsored at the University of Cambridge by the Water-Tube Boilermakers Association.

TL;DR: In this article, the conditions under which a thin liquid film will tend to completely wet a solid surface over which it is flowing are studied theoretically, based on a force balance at the upstream stagnation point of a dry-patch, the other on the minimum total energy rate in a transversely unrestrained stream.

TL;DR: In this paper, forced convection heat transfer and friction factors, obtained with water flowing through steam heated coils, are compared and compared with the limited results available to date, and existing equations for isothermal friction factors in smooth coils are deemed satisfactory.

TL;DR: The second-order slip flow analysis is applicable at somewhat lower pressures than is the first-order analysis and applies to non-monatomic as well as to monatomic gases as mentioned in this paper.

TL;DR: Laminar flow heat transfer in annulus, simultaneous development of velocity and temperature fields and constant wall heat flux were discussed in this article, where the authors used Laminar Flow Heat Transfer (LFT) to transfer heat from annulus.

TL;DR: In this paper, a general method for the correlation of forced convection heat transfer data is proposed, which consists in plotting, against the Reynolds number, a dimensionless group representing the experimentally measured data from which film heat-transfer coefficients would be calculated, namely, [ (t 1 − t 2 ) Δt m ] (S A), or its equivalent, h cG, multiplied by the two-thirds power of the group, (cμ k).

TL;DR: The transfer characteristics of volatile liquid drops evaporating while rising in a column of immiscible liquid are presented in this paper, where a study of cine-camera films taken during the heat-transfer process rendered information regarding the velocities and evaporation rates of butane and pentane drops.

TL;DR: In this article, an experimental study of the growth of bubbles during electrolysis was carried out by means of high-speed motion picture photography through a microscope, where bubbles were H2, O2, Cl2, and CO2 on platinum, nickel, copper, and iron electrodes, at pressures from 1 to 2 atm, with controlled constant current densities from 0·01 to 0·12 A/cm2.

TL;DR: Convective heat transfer for turbulent boundary layer flow through cooled convergent-divergent nozzle was investigated in this paper, where the authors used a cooling convergent divergent nozzle.

TL;DR: In this paper, the diffusion of a scalar quantity (ammonia gas) from a steady line source within a twodimensional turbulent boundary layer is studied, using a long 6 × 6 ft square test section, the boundary layer thickness varied from 5 to 11 in for distances of 3 to 43·5 ft downstream with air speeds from 9 to 16 ft/s.

TL;DR: It is shown that the larger the Hausen factor K K 0 the fewer the steps necessary for accurate solution, especially in an analogue representation where step length cannot easily be altered.

TL;DR: In this article, the latent heat transport and convection together account for the total flux in saturated boiling, and the basic parameters entering into the formulation of (q/A)LH, that is, the product of bubble frequency and bubble volume at departure, are further investigated.

TL;DR: The generalized heat balance equation for steady state heat transfer in heat-generating fluids is integrated for laminar flow of a power law non-Newtonian fluid in cylindrical tubes with circular sections, when volumetric heat generation rate depends linearly on local temperature.

TL;DR: In this paper, local heat transfer coefficients from a uniformly heated cylinder with water in cross flow are compared with analytical predictions and the influence of channel blockage is investigated and a correction presented for the effect of blockage on both the local and average heat transfer.

TL;DR: In this article, a calculation method for thermal resistance of a contact between two rough metal surfaces with different compressing forces and quality of finishing is considered, and the results of analytical calculation are correlated with experimental data.

TL;DR: In this paper, a general solution of the systems of differential equations describing the distribution of temperature and temperature difference of fluids in exchanger channels is given in a form enabling introduction of the boundary conditions.

TL;DR: In this article, the results of new measurements on the viscosity of dry air along seven isotherms in the range 25-250°C and 1 to 140 atm, subject to an uncertainty of ± 0.4 per cent, were presented.

TL;DR: In this paper, the mean heat transfer coefficient was investigated on a circular cylinder placed symmetrically in a two-dimensional jet of limited height, and the wall temperature of the cylinder was constant and the Reynolds number based on the cylinder diameter and the speed in the nozzle exit was around 20,000 to 50,000.

TL;DR: In this article, finite integral transform techniques are applied to the solution of three-dimensional, transient heat-conduction problems with general time-dependent heat sources and boundary conditions, such as prescribed temperature, prescribed heat flux and Newtonian convection conditions.

TL;DR: In this paper, the heating of a laminar liquid jet by the condensation of its saturated vapour is analyzed and a solution for heat transfer in circular and flat ducts held at constant wall temperature is adapted to the problems of vapour condensation on a cylindrical jet and on a sheet of uniform thickness respectively.

TL;DR: In this article, the gas separation taking place in the vortex tube is studied in detail, and a flow scheme involving the radial and axial flow components, which permit an interpretation and a correlation of the experimental data in a simple way, is put forward.

TL;DR: In this paper, the Einfluss der turbulenten Prandtl-Zahl (Verhaltnis der Austauschkoeffizienten fur Impuls and Warme) auf die Temperaturverteilungen in der turbulentEN Grenzschicht an der ebenen Platte bei inkompressibler Stromung wird rechnerisch untersucht Fur die beiden Falle “Eigenerwarmung” and “Warmeubertragung bei konstanter Wand

TL;DR: In this paper, it was shown that certain regularities exist in the exact solutions of the partial differential equation of uniform-property heat transfer published by Gardner and Kestin [3] and Smith and Shah [4].

TL;DR: In this article, the wall temperature distribution for laminar forced convection in rectangular channels with unequal heat addition on adjacent sides is investigated. And the authors show that the resulting wall temperature distributions are similar to those of Laminar Forced Convection.

TL;DR: In this paper, the authors considered a particular heat and water vapor transfer problem in a nonisothermal steady state system and applied it to a condition that may develop during the normal drying of porous materials.

TL;DR: In this article, the authors investigated the heat transfer characteristics of pseudoplastics in the entrance region of a circular tube and solved the momentum and energy equations for n = 0.5 and n = 1, respectively.

TL;DR: In this article, heat transfer measurements were carried out in packed beds through which water was flowing, for three sizes of glass spheres and one size of steel balls, and experimental results for both the radially effective thermal conductivities and the overall heattransfer coefficients were analyzed by means of the theoretical equations, previously published by the authors, showing the close coincidence between the calculated and the observed data.

TL;DR: In this article, a method has been developed to study the heat transfer in steam condensation on laminar water sheets generated by the fan spray nozzle, and the effects of steam pressure and air content in steam on the heat-transfer coefficient are investigated.

TL;DR: In this article, the authors considered the problem of the transfer of energy due to the combined effects of radiation and conduction for a gas with both temperature and frequency dependent properties, and proposed three approximation methods: gray gas approximation, picket fence approximation, and modified picket-fence approximation.