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ISSN Online: 2377-424X

International Heat Transfer Conference 3
August, 7-12, 1966, Chicago, USA

LAMINAR HEAT TRANSFER BETWEEN PARALLEL PLANES WITH RELATIVE MOTION AND PRESSURE GRADIENT

Get access (open in a dialog) DOI: 10.1615/IHTC3.1660
pages 235-249

Аннотация

The simultaneous development of temperature and velocity profiles in the entrance region between two parallel planes with relative motion and pressure gradient are studied using the Karman-Pohlhausen boundary layer analysis. Incompressible, constant property fluids having Prandtl numbers in the range of 0.1 to 10 are considered. The parallel surfaces are assumed to be held at different uniform temperatures with one surface fixed and the other moving in the range of zero to four times the average entering fluid velocity, giving a velocity ratio V* of plate to fluid ranging from zero to 4.

It is found that a separate Nusselt-Graetz relation results for each Prandtl number and surface; furthermore the results can be expressed in the form NNu = CNGz0.5 where Nu is the Nusselt number based on the average heat transfer coefficient and C is the coefficient depending on the Prandtl number and on the velocity ratio V*.

Results obtained in this analysis are applicable for the prediction of heat transfer in a strip heating furnace in which there is one fixed surface and one moving surface (the strip itself) separated by a flowing fluid, to cite one example.