Microscopic and Macroscopic Modelling of Multi-Phase Flows

本研究是对时变压力场中气泡尺寸振荡的理论和实验研究。以前的分析将扩展到包括气体溶解度的影响，这对于高溶解性气体或低溶解性气体但在大振幅压力波动下变得很重要。从这一微观观点得到的气泡动力学结果将用于推导气泡液体和雾中压力波的合适的宏观（平均）方程。该研究将有助于提高预测两相流可能发生的相变的能力，如在反应堆热工系统和意外释放中发生的相变。它也可用于空化、超声的医疗应用和超声清洗。

This research is a theoretical and experimental study of bubble size oscillations in time varying pressure fields. Previous analysis will be extended to include the influence of gas solubility which becomes important for highly soluble gases or for low solubility gases but at large amplitude pressure fluctuations. The results for bubble dynamics from this microscopic view point will be used to derive suitable macroscopic (averaged) equations for pressure waves in bubbly liquids and fogs. The research should lead to improved capability for predicting two phase flows with possible phase change such as occurs in reactor thermal hydraulic systems and in accidental releases. It should also be of use for cavitation, medical applications of ultrasound, and ultrasonic cleaning.