封闭空间内小尺度等温竖板自然对流的三维效应  

3D effect of natural convection on a miniscale isothermal vertical plate in an enclosure

作　　者：李娜[1] 李志信[1] 过增元[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《上海理工大学学报》2003年第3期218-220,共3页Journal of University of Shanghai For Science and Technology

基　　金：国家重大自然科学基金(59995550-2)

摘　　要：研究了封闭空间内小尺度等温竖板自然对流的三维效应。表明三维效应随着平板尺度的减小而增强,从而使换热增强。对于相同尺度的平板,采用不同的放置方式其换热状况也不相同。尺度较大时,竖放(高度方向长)比横放时换热强,但随着尺度的减小,两种放置方式的换热越来越接近。The three dimensional effect of natural convection on a miniscale isothermal plate in an enclosure is numerically studied. The 3D effect of the natural convection increases with scale reduction, and consequently the heat transfer is enhanced. For a given plate, the heat transfer features are different for the plate positioned vertically or horizontally. If the plate scale is relatively large, the heat transfer in the vertically positioned case is stronger than that in the horizontally positioned case, arid the difference between the both extents of heat transfer becomes smaller as the scale decreases.

关 键 词：小尺度 等温竖板 自然对流 三维效应 

分 类 号：TK16[动力工程及工程热物理—热能工程]