Mixed convection in the entry region of a vertical annulus with a constant temperature rotating inner cylinder

Abstract EN

Laminar air flow combined convection in a vertical annulus with a constant temperature rotating inner cylinder is treated on the basis of a developing flow model, and the basic differential equations are rewritten in finite difference form and solved by a computer program in FORTRAN.

Investigation covers the ranges of 0.2≤N≤0.9, –300≤Gr / Re≤800 and 0.2≤Re2 / Ta≤1000.

In addition to the usual heat transfer calculations, this enables the developing velocity and temperature fields to be studied.

On the other hand, the effect of a superimposed aiding or opposing natural convection on the developing tangential velocity profile is also investigated.