Abstract
The results of a three-dimensional numerical simulation of thermal-gravitational convection for an arbitrary direction of the gravity force are presented. The calculations were carried out for a rectangular domain with the solid-wall aspect ratio 4:0.5:1. The cavity filled with air was heated from below. The convection regime was laminar with Rayleigh numbers Ra = 103–105. The cavity was gradually turned about the short side in different directions in the range 0–90° to study how the initial conditions affect the convection. The average heat transfer characteristics and the spatial flow patterns are presented. A comparison with two-dimensional calculations is given. The conditions of the occurrence of a hysteresis in the steady state of convection are found, a regime map is constructed, and the specific features of the interaction of heat fluxes are described.
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