Mass Transfer and Transport Processes in Two Phase Flow

本项目的总体目标是发展一种新的理论认识，了解质量向壁面或在气/液边界的输运如何与流体力学因素相关，了解颗粒和液滴的湍流输运，了解分子物种的湍流输运如何与朗朗日统计相关。并对由气流产生的有限振幅界面波进行研究。这项工作的重要方面是将进行实验室和超级计算机相结合的实验，并将使用新开发的光学技术来研究粒子的朗朗日湍流特性。五个子项目正在进行研究：(1)固体边界传质；(2)粒子湍流输运的光学研究；(3)计算机研究；(4)波浪产生中的非线性效应；(5)气液边界处的传质。对流体和壁面湍流输运理论认识的提高，可以为计算浓度（和温度）场提供更好的方法；但是，同样重要的是，它将有助于理解如何控制或提高传质速率。粒子输运和波浪产生的基础研究结果将改进我们预测多相流系统性能的方法。

The general objectives of this project are to develop a new theoretical understanding of how the transport of mass to a wall or at a gas/liquid boundary is related to fluid mechanical factors, to understand the turbulent transport of particles and droplets, to understand how turbulent transport of molecular species is related to Langrangian statistics, and to carry out studies of finite amplitude interfacial waves that are generated by an air flow. Important aspects of this work are that combined laboratory and supercomputer experiments will be conducted and that newly developed optical techniques will be used to study Langrangian turbulence characteristics of particles. Five sub-projects are under investigation: (1) Mass transfer at a solid boundary; (2) Optical studies of the turbulent transport of particles; (3) Computer studies; (4) Non-linear effects in wave generation; (5) Mass transfer at a gas- liquid boundary. The improved theoretical understanding of turbulent transport in a fluid and to a wall could provide better ways to compute concentration (and temperature) fields; but, just as important, it will help in understanding how to control or enhance mass transfer rates. The results from basic studies of particle transport and of wave generation will improve our methods to predict the performance of multiphase flow systems.