SOLUTION OF THE HEAT TRANSFER OF LAMINAR FORCED-CONVECTION IN NON-CIRCULAR PIPES

Abstract

The heat transfer problems of forced-convection in non-circular pipes have many engineering applications. In this a paper a formal solution is given when the mapping function z = w(~) ~ ~ an~ n, which maps conform- n=0 ally the cross-section of the channel onto the unit circle y in the ~-plane is known. The expressions for the average velocity, average temperature, mixed mean temperature, heat transfer rate and the Nusselt number have been expressed in terms of the constants an