一般认为，米粒组织代表最上部的对流元穿入稳定大气时的超越部分。
The granulation is commonly thought to represent the overshoot of the topmost convective elements as they penetrate the stable atmosphere.
微元体的综合反应速率、对流速度以及反应器的长度本身是影响反应器反应类型的重要因素。
The overall rate of REV, length of reactor itself and convection all contribute remarkably to the performance of reactor.
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。
The computation of natural convection in the annulus between horizontal concentric cylinders using spectral element method in polar coordinates is presented in this paper.
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