Abstract
Two-dimensional numerical computations have been conducted to investigate natural convection of liquid metal in a square cavity bounded by vertical walls at uniform of heat flux gradient and insulated horizontal walls. In any heat flux gradient ,k secondary small cells are formed and oscillatory convection is dominant. Mean Nusselt number, Nu^^^- becomes higher with increasing k since a large k causes the thermal boundary layer to be extremely thin. A practical correlation equation is derived for Nu^^^- depending upon k.
