气液界面Marangoni效应对传质系数的影响Effect of Interficial Marangoni Convection on the Mass Transfer Coefficient
周超凡,余黎明,曾爱武,余国琮
摘要(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。
关键词(KeyWords)： Marangoni效应;界面湍动;质量传递;表面张力梯度
基金项目(Foundation): 国家自然科学基金资助项目(20136010)。
作者(Author): 周超凡,余黎明,曾爱武,余国琮
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