微通道内非牛顿流体-弹性颗粒液固两相流动特性研究

项目名称： 微通道内非牛顿流体-弹性颗粒液固两相流动特性研究

项目编号： No.51476127

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 能源与动力工程

项目作者： 赵亮

作者单位： 西安交通大学

项目金额： 85万元

中文摘要： 微通道内液固两相流动在微流传感器及微流体芯片的发展中有着重要的应用。本项目拟在前期微通道内牛顿流体-刚性颗粒液固两相流动研究的基础上，重点研究微通道内卡森类非牛顿流体与弹性颗粒的液固两相流动特性及颗粒的富集与分离规律。研究拟建立卡森类非牛顿流体数学模型，对微通道内的非牛顿流体流动进行数值模拟；使用μ-PIV测试技术和微传感器技术，获得并验证微通道内非牛顿流体的流动特性；建立弹性颗粒模型，考虑微通道中液固两相相互作用，构建双向耦合模型，数值模拟获得微通道内非牛顿流体-弹性颗粒液固两相流动特性；通过显微镜和高速摄像机等可视化手段，获得微通道内非牛顿流体-弹性颗粒液固两相流动特征和规律；基于上述机理研究结果，发展新的微通道结构用于弹性颗粒的被动式高效富集与分离。本项目研究对于探索微尺度多相流动机理，发展新型高效的微流体处理技术具有重要的学术价值和应用前景。

中文关键词： 液固两相流；微通道；非牛顿流体；弹性颗粒

英文摘要： Liquid-solid two-phase flow in microchannels has important applications in the development of microfluidic sensor and microfluidic chip. Based on the previous study on Newontonian fluid-rigid particle two-phase flow in microchannel, the mechanism of Casson fluid-elastic particle two-phase flow and elastic particle focusing and separation in microchannel is planned to be researched in this project. A mathematical model of Casson non-Newtonian fluid will be built, and the flow of non-Newtonian fluid in microchannel will be simulated. Meanwhile, the flow of non-Newtonian fluid in microchannel will be experimentally measured with μ-PIV and micro-sensor technologies. A mathematical model of elastic particle and a two-way coupling model between non-Newtonian fluid and elastic particle will also be built to investigate the mechanism of non-Newtonian fluid-elastic particle two-phase flow in microchannel. The two-phase flow in microchannel will be measured with microscope and high-speed camera. Based on the above-mentioned research, new microchannels will be developed for efficient focusing and separation of elastic particles without external force field. This work will be very helpful for the mechanism study of multi-phase flow in microchannel, and the development of efficient microfluidic technologies.

英文关键词： liquid-solid two-phase flow;micro channels;non-Newtonian fluid;elastic particles