项目名称： 空间磁场及其与电场耦合对微纳尺度下边界滑移和流体阻力影响规律的研究

项目编号： No.51505108

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 潘昀路

作者单位： 哈尔滨工业大学

项目金额： 20万元

中文摘要： 随着微纳米技术不断发展，微纳流体系统在机械、医疗和生物等方面取得了广阔的应用。对微通道内液体流动阻力的控制，特别是实时控制手段的缺乏目前制约着微纳流体系统的进一步发展，对微通道内液体流动阻力的形成机理和影响因素进行深入研究具有重要的理论意义。首先利用理论分析和实验测量相结合的方法研究磁场对固液界面上边界滑移的影响机理和规律，结合磁场对溶液动力粘度的影响，分析磁场作用对液体流动阻力的影响。综合申请人前期所作电场对边界滑移、流动阻力影响的研究成果，分析电场、磁场的联合作用对边界滑移的影响，特别是电场、磁场的耦合作用，建立其数学模型并设计相应实验验证和完善所建立的模型。进而建立一、二维微纳通道物理模型，利用多物理场有限元仿真分析，得到微纳尺度下微通道内液体流动阻力受电场、磁场联合作用综合影响的规律及机理。最终探索一种通过施加空间电场、磁场实现实时控制微纳流体系统内流动阻力的方法。

中文关键词： 固液界面；微纳流体系统；流体阻力；电场磁场耦合；滑移长度

英文摘要： Based on the development of micor/nano technology, the micro/nanofludic systems are widely used in mechanical, medical, biological applications. However, the lack of the control method, especially the real-time control of the drag of liquid flow limited the further development of micro/nanofludic systems. The study of the influence factors and formation mechanism of the drag of liquid flow is needed. This research firstly study the effect of magnetic field on the boundary slip based on theoretical analysis and experimental methods, analyze the effect of magnetic field on the liquid flow. By considering the effect of electric field on boundary slip and liquid flow together, the coupling effect of magnetic and electric field on the boundary slip is analyzed, a mathematic model and experiments are built and designed to verify and improve the theoretical model. Then based on the physical model of one dimensional and two dimensional micro channel, by using COMSOL multiphysics software, the coupling effect of magnetic field and electric field on the liquid flow in micro channel is obtained. Finally a method which is based on applying magnetic field and electric field to real-time control the drag of liquid flow in micro/nanofluidic system is explored.

英文关键词： Interface of solid and liquid;micro/nano fluidic systme;drag of fluid flow ;coupling effect of electric and magnetic field;slip length