二维封闭腔内有单极电荷注入时的流动不稳定性与传热研究

项目名称： 二维封闭腔内有单极电荷注入时的流动不稳定性与传热研究

项目编号： No.11502137

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 王伯福

作者单位： 上海大学

项目金额： 25万元

中文摘要： 电流体动力学常用来增强流动混合、增强传热和进行流动控制等，对其深入研究具有重要科学和工程意义。本项目研究介电流体在单极电荷注入时，电流体系统在等温和加热两种情况下的流动不稳定性和流动非线性演化过程。考虑平板电极与圆环电极两种典型构型，首先分析在几何因素和物理因素以及温度因素影响下的动力学失稳与分叉特性，研究初始条件与边界条件对分叉路径的影响，详细分析不同阶段流场结构特征与流动失稳机制；其次详细研究两种电极电场强化传热的效果，分析不同因素影响下电场强化传热的规律和机制，比较两种电极强化传热的异同点。从流体动力学分叉与增强传热两方面为工业应用提供参考。

中文关键词： 线性稳定性；电流体动力学；电-热流体动力学；分叉；电场强化传热

英文摘要： Electrohydrodynamics(EHD) usually finds its application in flow mixing, heat transfer enhancment and flow control. It is worth studing for both foundamental research and industrial application reason. This project will be devoted to study the flow instability and nonlinear evolution of EHD convection induced by unipolar injection in dielectric liquid. The parallel plate electrodes and the concentric annular electrodes are considered. The effects of geometric configuration, physical parameters and temperature on the flow instabiility and bifurcation are analyzed. Moreover, the effects of initial and boundary conditions are taken into consideration as well. The flow structure and the instabililty mechanisms are studied in detail in different flow regimes. The ability of heat tranfer ehancment for both types of electrodes are fucused on. The properties of heat transfer under different situations are summarized and compared. The study of flow bifurcation and heat transfer enhancement are in purpose of providing valuble reference for application.

英文关键词： Linear stability;Electrohydrodynamics;Electro-thermo-hydrodynamics;Bifurcation;Electric field enhanced heat transfer