Mass transfer from spheres in various regular packings to a flowing fluid
Mass transfer from spheres in various regular packings to a flowing fluid
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DOI：
10.1016/0009-2509(58)85034-4
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发表时间：
1958-06
影响因子：
4.7
通讯作者：
D. Thoenes;H. Kramers
中科院分区：
文献类型：
--
作者：
D. Thoenes;H. Kramers
流体围绕单个球体流动的传质系数已被确定，这些球体是相似但不活跃的球体规则排列的一部分。使用了八种不同的包装。这些实验是在实心球体溶解在一股水中，以及多孔球体被液体浸泡，液体蒸发成一股气流的情况下进行的。假定球体表面的总传质是三种不同贡献的总和：一种是层流对流传递，一种是湍流对流传递，另一种是邻近球体接触点附近滞流区的扩散。后一种贡献只对雷诺数不太高的气体流动才重要(雷诺数500)。
Mass transfer coefficients have been determined for fluids flowing around single spheres, which were part of a regular arrangement of similar, but inactive spheres. Eight different kinds of packing were used. The experiments were carried out with solid spheres dissolving into a stream of water, and with porous spheres soaked with a liquid, which evaporated into a stream of gas. The results are tentatively explained on the assumption that the total mass transfer from the sphere surface is the sum of three different contributions : one for laminar convective transfer, one for turbulent convection transfer and one for diffusion in the stagnant regions near the contact points with adjacent spheres. The latter contribution would only be important for gas flow at not too high Reynolds numbers (Re< 500).