磁流变液在圆筒间的粘塑性流动

Viscoplastic flow of the MR fluid between two cylinders

磁流变液具有粘性和粘塑性流体特性。基于Navier-Stokes方程,分析了外加磁场对在两圆筒间隙间的磁流变液粘塑性流动的影响,得到了速度和流量表达式,为圆筒式磁流变器件的设计提供了理论依据。研究结果表明:速度沿磁场方向呈抛物线和直线分布;流量可由外加磁场连续调控。

Magnetorheological （MR） fluids have the properties ot both ViSCOSity and Viscoptasticity. Daseu on Navier-Stokes＇ equation,a theoretical analysis of the effect of the applied magnetic field on the viscoplastic flow in the gap between two cylinders is presented. 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 MR devices. The results indicate 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.