Abstract

The gevernine equation for fully developed laminar natural convection in a vertical annulus have been analytically solved for the isothermal wall boundary conditions. The resulting flow rates and Nusselt numbers are a function of a annulus gap and a non-dimensional temperature ration. These results are compared to those obtained from a finite-difference solution of the developing flow. It is concluded that fullt developed conditions may be assumed for Grashof numbers smaller than 10.

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