• EFFECT OF THERMAL RADIATION ON CONVECTIVE HEAT TRANSFER FLOW OF AL2O3-WATER NANO FLUID IN A CONSTRICTED WAVY PIPE WITH THERMAL RADIATION

Abstract

An attempt has been to investigate the effect of thermal radiation on free convective  heat transfer flow of nanofluid fluid in a non-uniformly heated corrugated pipe in the presence of a constant heat source.The non-linear governing equations have been solved by using perturbation with the slope d of the boundary of the pipe as  perturbation parameter. The effect of thermal radiation and waviness of the boundary on all flow characteristics are discussed graphically. The stress and Nusselt number on the boyndary have been evaluated numerically for different variation. It is found that higher the amplitude of the non-uniform boundary temperature reduces the axial velocity and enhances the secondary velocity and temperature. Higher the dilation of the boundary larger the velocity and temperature in the flow region.