The computation of natural convection in the annulus between horizontal concentric cylinders using spectral element method in polar coordinates is presented in this paper.
提出了将谱元方法应用到极坐标系下，利用极坐标系下的谱元方法求解环形空间内自然对流问题。
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The algorithm mentioned is valid and reliable by 3d reconstruction on a pair of actual natural images with weak texture and the standard piece with given precise 3-d coordinates, respectively.