突扩管中磁性流体二维流动的模拟

2-D simulation of magnetic fluid through abrupt expansion

数学模拟可以用来预测流体在突扩管中的流动并更好使用和优化产品制造。使用Herschel-Bulkley(H-B)作为本构方程。在没有磁场的条件下,通过改变参数,我们获得了不同磁性流体的流动过程并分析了回流区长度与参数之间的关系。

Numerical simulation can be used to predict fluids flow through abrupt expansion, and hence to help us to optimize the expansion design. The behavior of magnetic fluids （MFs） flowing through an abrupt expansion is investigated without the application of magnetic field. The Herschel-Bulkley （H-B） model was employed as the constitutive equations. By changing the parameters in the H-B model, different flow patterns of MFs flowing through an expansion were obtained. Vortex length （Lv） of the recirculation zone was analyzed.