Laminar natural-convection flow and heat transfer of fluids with and without heat sources in channels with constant wall temperatures

Author / Creator

Ostrach, Simon, author

Available as

Online

Summary

An analysis of the natural-convection phenomenon shows that the flow and heat transfer, in general, not only are functions of Prandtl and Grashof numbers but also depend on a new dimensionless para...

An analysis of the natural-convection phenomenon shows that the flow and heat transfer, in general, not only are functions of Prandtl and Grashof numbers but also depend on a new dimensionless parameter. If this parameter is not negligibly small, the compression work and frictional heating may appreciably affect this mode of heat transfer. Particular consideration is given to the fullly developed natural-convection flow of fluids with and without heat sources between two long parallel plane surfaces whose temperatures are maintained constant but not necessarily equal. Detailed velocity and temperature distributions are obtained from which the effects of heat sources in the fluids and frictional heating on the process can be seen. Frictional heating and heat sources increase the velocities and temperatures. Increasing the ratio of the two wall-temperature differences (wall minus outside ambient) also leads to similar results.

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