数值预测气泡形状演变对温度和浓度场的影响

The Numerical Prediction of Effects of a Gas Bubble Deformation on Temperature and Concentration Fields

提出预测气泡在静止的液体中上升时 ,形状演变对周围液体的温度和浓度场的影响的数值方法。在这个方法中 ,在每个时间步长内 ,使用直接预测 (direct-predictor)和交替求解变量 (ADV)两方法进行内部迭代。利用所发展的方法和程序 ,模拟无粘性的气泡在静止的粘性不可压缩牛顿流体中上升时的形状演变过程以及对浓度和温度场的影响。给出不同物理条件下 ,气泡演变的途径和终态稳定的气泡形状。

This paper proposes a numerical method to predict the evolution of concentration and temperature fields around a deformed gas bubble rising in a quiescent hot and bi\|solution liquid, in which an inner iteration combining with a direct\|predictor method and an ADV skill developed by authors of this paper has been developed. With a code including these methods, this paper presents an understanding of interfacial transport characteristics of a deformed inviscid bubble rising in a quiescent hot or bi\|solution liquid. The results demonstrate that the bubble deformation has a significance influence on concentration and temperature fields around a deformed bubble.