本文针对液-液两相接触时的传质过程,以流体动力学理论及相间传质的渗透理论为基础,根据界面上惰性气泡逸出界面时流体流动及传质过程的特征,导出了气泡促进的相间传质系数的数学关系式。该关系式表明,流体中传质速率不仅与逸出气泡的体积速度的平方根成正比,同时与气泡大小、界面上气泡分布密度等参数有关。该关系式能较好地描述文献中的实验数据。
A mathematical relation is derived for mass transfer coefficient at pha-se interface evolving inert gas bubbles based on the character of fluid flow andmass transfer, which is checked with literature data. It shows that the mass transfercoefficient induced by inert gas bubbles is not only proportiona to the square rootof the volume rate of gas, but also related to the behaviour of gas bubbles suchas bubble size, bubble distribution density and interface area.
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