Abstract
In the present work, mixed convection was studied using the direct numerical simulation (DNS) method for the upward flow of a liquid metal (Pr = 0.025) in a vertical rectangular heated channel. The Reynolds number (Re) varied from 104 to 2·104. The criterion for the appearance of thermogravitational convection, as well as the characteristic of the intensity of its influence, was the Grashof number (Gr), which varied in the range from 0 to 4·109. A significant and ambiguous effect of free convection on hydrodynamics and heat transfer, which depends on the ratio Gr/Re2 and the Prandtl number, is obtained.
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