微流体惯性开关用磁流变液流动特性分析

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英文篇名：Flow Characteristic of Magnetorheological Fluid Using for Microfluidics Inertial Device 作者：王铭亮 ; 黄家瀚 ; 张崇 ; 沈腾 英文作者：WANG Liangming;HUANG Jiahan;ZHANG Chong;SHEN Teng;College of Mechanical and Mechanics,Ningbo University;School of Mechanical and Electric Engineering; 关键词：磁流变液 ; 微流体惯性开关 ; 阈值 ; 流动特性 英文关键词：magnetorheological fluid;;microfluidics inertial device;;threshold;;flow characteristic 中文刊名：CGJS 英文刊名：Chinese Journal of Sensors and Actuators 机构：宁波大学机械工程与力学学院;广州大学机械与电气工程学院; 出版日期：2019-03-15 出版单位：传感技术学报 年：2019 期：v.32 基金：国家自然科学基金项目(51805277,51675282);; 浙江省教育厅科研计划项目(Y201635851);; 宁波大学科研基金项目(XYL17006) 语种：中文; 页：CGJS201903006 页数：6 CN：03 ISSN：32-1322/TN 分类号：35-40

摘要

针对目前微流体惯性开关流动电极材料单一、阈值较低且无法调节等问题,以磁流变液为流动液体,提出一种高g值,且阈值可调的微流体惯性开关。首先对磁场环境下磁流变液的阈值特性、速度分布和流动特性进行了理论建模和数值模拟,并对MRF-132AD磁流变液在矩形微通道中的流动特性进行有限元仿真。数值模拟和仿真结果表明:调控外加磁场可调节基于磁流变液的微流体惯性开关的阈值大小,且磁流变液的流速随着外加磁场的增大而变小,具有微阀功能,阈值可调范围为0～2 885 g_n,可用于高g值、宽阈值的微流体惯性器件。
        To solve the problem of variety lack of flow electrode,low and unadjustable threshold,an inertial device with high g value and adjustable threshold was presented by using magnetorheological fluid as flowing fluid. Firstly,the flow velocity distribution and the characteristics of threshold and flow were analysis theoretically and simulated;and then the flow characteristic of magnetorheological fluid in rectangular microchannel was discussed using finite element simulation. The numerical analysis and simulation results show that the threshold can be adjusted by controlling applied magnetic field,and the flow velocity gets smaller with the increasing of magnetic field,the threshold of magnetorheological fluid can be adjusted from 0 to 2 885 gn,which was available for microfluidics inertial device with high g value and wide threshold.

引文

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