摘要
用Herschel-Bulkley模型描述了磁流变液随外加磁场变化的流变行为;基于动量方程,分析了磁流变液在圆管内的压力驱动流动,得到了流速和流量表达式,为圆管磁流变器件的设计提供了理论依据。研究结果表明:磁流变液具有粘性和粘塑性流体特性;磁流变液在圆管内的流动呈粘塑性流动;流速沿磁场方向分段呈现抛物线和等速直线分布;流量可由外加磁场连续调节。
Herschel-Bulkley model is used to describe rheological behavior of the Magnetorheological （MR） fluids subject to an applied magnetic field. Based on momentum equation, the effect of the applied magnetic field on the pressure driven flow of the MR fluids in the cylindrical pipe is analyzed theoretically. The expressions for the velocity and the volumetric flow rate in viscoplastic flow are derived to provide a theoretical foundation for the design of cylindrical pipe MR devices. The results indicate the MR fluids have the properties of both viscosity and viscoplasticity. The flow of the MR fluids in the cylindrical pipe exhibits viscoplastic flow behavior. The velocity exhibits the distributions of both parabolic curve and straight line with the magnetic field direction. The volumetric flow rate can be continuously adjusted by an external magnetic field.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第9期152-156,共5页
Journal of Chongqing University
基金
国家自然科学基金资助项目(51175532)
重庆市科委自然科学基金计划资助重点项目(CSTC
2011BA4028)
关键词
磁流变液
压力驱动流动
流速分布
体积流量
MR fluids
pressure driven flow
velocity distribution
volumetric flow rate
