本文描述由一个局部内热源和外部加热同时作用引起的封闭空腔内非稳态、二维、层流自然对流换热的数值分析结果。
Numerical analysis is made for the unsteady and steady, two-dimensional laminar natural convection in an enclosure caused simultaneously by the external heating and a local internal heat source.
该装置是一种提高局部小环境洁净度等级的空气净化产品，利用净化单元可制作简易洁净工作台、净层流罩、净传递柜和洁净存衣柜。
BSU is small HEPA filter and fan unit, which is used for many purposes by users plan such as simple clean bench, clean booth , clean passbox& clean garman stocker etc.
通过对计算数据进行拟合之后，得到了层流时自由盘盘面局部努塞尔数的相对偏差与盘面无量纲局部温差的计算关联式。
A correlation formula of relative difference of local Nusselt number and dimensionless local temperature difference was presented by fitting numerical data.
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