From cat's eyes to multiple disjoint natural convection flow in tall tilted cavities: A direct primitive variables approach

Natural convection fluid flow in air-filled tall tilted cavities is studied numerically with a new direct projection method on the Boussinesq approximation in primitive variables. The study deals with cat's eyes instabilities and multiple disjoint cells as the aspect ratio A and the angle of inclination phi of the cavity vary. The flows are validated with those reported before using the stream function-vorticity variables. New cases, A = 12 and 20 varying phi, lead to get more insight on the physical phenomenon. (C) 2013 Published by Elsevier B.V.