The study proposed the optimal spacing for natural convectionlayer and the effects of some factors on the thermal performance of the roof which can give the references for applications.
The results of visualization experiment show that temperature and flow fields are un-steady and three dimensional in space for this natural convection of horizontal air layer heated from below.
实验结果表明，这种水平空气层自然对流换热是非稳态的，并且在空间上是三维的。
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The temperature boundary layer of a natural convection along a vertical heated plate is measured quantitatively.