Computational investigation of confined wall inclination effects on impinging jet fluid flow and heat transfer

Abstract

In this study, the inclination angle effects of the confined wall on impinging jet fluid flow and heat transfer are investigated computationally. Mainly six inclination angles of confinement plate -2 degrees, 0 degrees, 2 degrees, 4 degrees, 6 degrees, and 8 degrees are considered. Flow is assumed two-dimensional, steady, incompressible, and turbulent. Jet Reynolds number is 10200. SST k-omega) turbulence model was chosen since this model is recommended in some recent studies. Conservation equations for the computational model were solved by using ANSYS-Fluent code. Flow structures are completely governed by the inclination angle, and the center of the main vortex moves to the right by increasing the inclination angle. Predictions show that the inclination angle has a great influence on flow characteristics and heat transfer in the wall jet region after the second peak. Local heat transfer increases with the increasing inclination angle of the confinement plate after X/D = 10. The cumulative increase in average Nu number from 0 degrees to 8 degrees is almost 18%.