HEAT TRANSFER FOR THE FLOW OF A POWER-LAW FLUID IN A CURVED PIPE

Abstract

In this paper We have studied the heat transfer in the flow of a power law fluid in a curved pipe of Circular cross-section. Following Dean, we assumed the curvature of the pipe to be small and evaluated the temperature distribution upto the first order in the parameter t, which in the ratio of the radius of pipe to that of the toil. It is found that the fluid is heated throughout relative to the wall upto a critical Prandtl number and jar higher Prandtl numbers relatively cooled and heated regions develop. The physital reasons for such a behaviour are analysed. By the study of the variation of this Prandtl number with flow behaviour index n, we conclude that distant fluids (n> I) are suitable for more efficient working of heat exchangers. The Nusselt number is not affected by curvature upto the first order of L.