Natural convection in tilted square cavities with differentially heated opposite walls

Abstract

Natural convection in air-filled, tilted square enclosures with two adjacent walls heated and the two opposite walls cooled is numerically studied. A computational model based on the SIMPLE algorithm is used for solving the mass, momentum, and energy transfer governing equations. Simulations are performed for different values of the Rayleigh number in the range 10(4) 225 degrees, the heat transfer rate is the same as that for angle (450 degrees - gamma). In addition, the occurrence of hysteresis phenomena around gamma = 45 degrees is documented within a range of y whose extent decreases from nearly 20 degrees to nearly 4 degrees as the Rayleigh number increases from 10(4) to 10(6). (c) 2005 Elsevier SAS. All rights reserved