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Effect of Interficial Marangoni Convection on the Mass Transfer Coefficient
Author(s): 
Pages: 433-437
Year: Issue:  4
Journal: JOURNAL OF CHEMICAL ENGINEERING OF CHINESE UNIVERSITIES

Keyword:  Marangoni效应界面湍动质量传递表面张力梯度;
Abstract: 在气液相际传质过程中,界面Marangoni湍动会对传质过程产生重要的影响,为此,建立了一套气液接触传质设备,以使得通过N2与异丙醇稀溶液逆流接触将液体中使表面张力降低的溶质解吸出来,从而引发Marangoni湍动,提高传质速率.发生Marangoni对流时,液相的传质系数比只依靠扩散传质而不考虑Marangoni效应时大,因此引出增强因子F这一概念,通过计算F的值即可判断Marangoni效应对传质速率影响的程度.提出了一个包括Marangoni准数的计算传质系数关联式,其计算结果与实验结果相符.
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