Numerical simulation of two-dimensional room air flow with and without buoyancy

Abstract

This investigation deals with the velocity and temperature distribution in a room heated by a warm air stream introduced at various levels. Numerical solutions of Navier Stokes equations and energy equation have been obtained by SIMPLE and Semi Implicit Method for Pressure Linked Equation-Consistent (SIMPLEC) algorithms. Steady, laminar, and incompressible flow under Boussinesq's approximation has been considered. Solutions are presented for various locations of inlets and outlets, and for different values of Grashof number and Reynolds number. If the outlet is located at a lower level than the inlet, an increase in Gr makes the warm jet almost horizontal, which finally bends downwards towards the exit. An increase in Gr increases the intensity of recirculation and yields uniform temperature distribution. Location of outlet at higher level than the inlet leads to better temperature distribution.