Results 301 to 310 of about 574,276 (352)

Bulk transfer coefficient for heat transfer

Journal of Geophysical Research, 1969
A bulk heat-transfer relation applicable to unstable conditions is proposed. The relation incorporates the assumptions that heat transfer near the surface is by molecular conduction, and the bulk transfer relation does not depend explicitly on the surface roughness characteristics, provided that roughness elements are not large in comparison with the ...
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Mass and heat transfer coefficients

2013
In a blood oxygenator, the blood spends approximately 2 s passing through the device. Estimate a minimum value for h m , the mass transfer coefficient characterizing oxygen transport from the plasma to the inside of a red blood cell (RBC), such that the RBCs are completely (i.e.
Mark Johnson, C. Ross Ethier
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Measurement of Heat Transfer Coefficients

2013
In this chapter, measurements of steady-state Nusselt numbers in superposed fluid-porous layers with η < 1 and δ < 1 are discussed and compared to computed values. These measurements point to the need for more exhaustive experimentation over an extended range of Rayleigh number, but they also provide entirely new data for that case where δ < 1 and η ...
Aniruddha Bagchi, Francis A. Kulacki
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Condensation heat transfer coefficient versus wettability

Applied Surface Science, 2015
Abstract In this paper we show how condensation on substrates can induce wetting behavior that is quite different from that of deposited or impinging drops. We describe surfaces with the same wettability in ambient conditions presenting different wetting behavior and growth of droplets in condensation.
M. Roudgar, J. De Coninck
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Heat Conduction at a Variable Heat-Transfer Coefficient

High Temperature, 2019
Some practically important problems of unsteady heat conduction with a time-variable relative heat-transfer coefficient are considered. Various approaches to finding a solution to the analytical problem are systematized: decomposition of the generalized integral Fourier transform, the serial expansion of a sought temperature function, and the reduction
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Heat transfer from extended surfaces subject to variable heat transfer coefficient

Heat and Mass Transfer, 2003
The present article investigates the effect of locally variable heat transfer coefficient on the performance of extended surfaces (fins) subject to natural convection. Fins of different profiles have been investigated. The fin profiles presently considered are namely; straight and pin fin with rectangular (constant diameter), convex parabolic ...
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Heat transfer in a tunnel pasteuriser. Part II: Heat transfer coefficients

Journal of Food Engineering, 1984
Abstract The effect of heat transfer resistances on the overall heat transfer between water spray and liquid heated in a glass container has been studied. Values for convective and overall heat transfer coefficients were determined. The overall heat transfer coefficient was affected by hot water spray intensity, location of bottle in relation to the ...
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Heat‐transfer coefficients for industrial gases

Journal of Applied Chemistry, 1952
AbstractIn order to find out the correct size required for heat exchangers, waste‐heat boilers, gas coolers, etc., heat‐transfer coefficients are needed. Although the available literature provides us with the most recent formulae for these coefficients it is nevertheless difficult to assemble all the technical data of the required dimensions.
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Transforming heat transfer with thermal metamaterials and devices

Nature Reviews Materials, 2021
Ying Li, Wei Li, Tiancheng Han
exaly  

DETERMINATION OF THE HEAT TRANSFER COEFFICIENT DURING CONVECTION HEAT TRANSFER

Power Engineering Problems
The article is devoted to determining the heat transfer coefficient during convective heat transfer. Convective heat transfer or heat transfer is the process of heat transfer between the surface of a solid and the surrounding medium (gas or liquid). In this case, heat transfer occurs due to the combined action of thermal conductivity and convection ...
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