REU Supplement: Mass Transfer and Two-Phase Flow

本课题包括四个方面的内容：(1)对湍流液体与固壁之间的传质速率和湍流空气对同时流动液体的吸氧速率进行了新的物理解释：(2)研究了湍流流体中颗粒的弥散，以了解流体湍流对含有流体的管壁上沉积速率的影响；(3)高速气液两相流动的环状流型具有沿壁面运动的气膜和夹带在湍流同时流动气体中的液滴。正在研究实际环状流条件下壁膜雾化形成液滴的速率和液滴在壁膜上的沉积速率；以及(4)正在对波浪上的湍流速度场进行测量，以预测波上的压力和剪力。

This project has four aspects: (1) new physical interpretations of mass transfer rates between a turbulently flowing liquid and a solid wall and oxygen absorption rates from turbulent air to a concurrently flowing liquid are developed; (2) the dispersion of particles in turbulently flowing fluids is studied to understand the influence of fluid turbulence on the rate of deposition upon the pipe wall that contains the flow; (3) the annular regime that exists for high velocity gas-liquid flows has a film that moves along the wall plus droplets entrained in the turbulent concurrently flowing gas. Studies of the rate of formation of drops by atomization of the wall film and the rate of depositon of droplets on the wall film under actual annular flow conditions are being conducted; and (4) measurements of the velocity field for turbulent flow over a wave are being made to understand to predict the pressure and shear forces on the wave.