微通道内气液界面传质机理与调控

项目名称： 微通道内气液界面传质机理与调控

项目编号： No.21276175

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 化学工业

项目作者： 马友光

作者单位： 天津大学

项目金额： 80万元

中文摘要： 研究微通道内气液界面传质机理与调控机制。利用高速摄像仪实时测定和研究微通道内气泡传质过程的界面演化规律。采用微粒子图像测速仪（micro-PIV）、实时显微激光全息干涉仪分别对微通道内气液两相传质过程的速度场和浓度场进行实时测量。考察气液流速、流体物性、微通道结构和尺寸、流体PH值和温度等对气液传质过程的影响及调控机制。以运动流体的Navier-Stokes方程和传质对流－扩散方程为基础，采用格子－玻尔兹曼（LBM）方法，对微通道内气液传质过程进行模拟计算，结合实验测量结果，揭示该过程的气液界面传质机理，建立微通道内气液界面传质非平衡及非线性预测模型，为进一步研究微系统中气液传质特性提供实验和理论基础。

中文关键词： 微通道；气泡；聚并；气-液传质；调控

英文摘要： This subject aims at the interfacial mass transfer mechanism and its manipulation method for gas-liquid two-phase flow in microchannels. The evolution for gas-liquid interface during the mass transfer process of bubbles in microchannels is captured by high speed digital camera. The instantaneous flow fields and concentration fields for the interfacial mass transfer in various liquids in microchannels will be measured respectively by using a micro-particle image velocimetry (micro-PIV) and the real-time laser holographic interference technique. The influences of several parameters, such as gas and liquid flow rates, liquid properties (viscosity, surface tension and rheological properties), microchannels' geometry and size, PH value and temperature on mass transfer process between bubbles and liquids and controlling method will be studied. On the basis of Navier-Stokes equation for the moving fluids and convection - diffusion equation for mass transfer, the lattice - Boltzmann (LBM) method will be applied to simulate interfacial mass transfer between bubbles and liquids in microchannels. The transport phenomenon between gas-liquid two phases and interfacial mass transfer mechanism will be revealed. The non-equilibrium and non-linear models for predicting interfacial mass transfer between bubbles and liquids will

英文关键词： Microchannel；bubble；mass transfer；breakup；coalescence