方腔尺寸对封闭方腔内多块孤立平板自然对流换热影响的数值分析

１引言封闭方腔内多块孤立平板自然对流换热是许多电子设备散热的近似模拟，因此，了解封闭方腔内多块孤立平板的自然对流换热规律，对于电子设备的热设计具有重要的意义。国内外许多学者针对这方面的问题进行了较为广泛的研究［１－５］，许多学者研究了封闭方腔内一块或...

THE EFFECT OF ENCLOSURE SIZE ON NATURALCONVECTION IN A CUBE ENCLOSURE WITHMULTIPLE INTERNAL ISOLATED PLATES

The natural convection heat transfer in a cube enclosure with multiple internal isolatedplates has been simulated using 3D SIMPLEN program. It is found that with the increase ofL/H, the Nusselt numbers of every plate decrease quickly and then increase slowly. Thereis an enclosure-size (for vertical plates L/H=1.7, for horizontal plates L/H =1.8) whichwill deteriorate the ability of heat transfer of the plates group. When L/H > 3, the effect ofL/H on the heat transfer of the plates group is very little.