为验证拉格朗日 欧拉方法的准确性 ,对高分子溶液的 2∶1绕圆柱流动问题进行了数值模拟 ,采用单松弛时间的PhanThien Tanner本构方程 ,得到PIB/C14溶液在De =0 93的绕流计算结果 ,同Baaijens等所做的绕流实验中的稳态流场物理量的测量结果进行了比较 ,在定量上取得较好的一致性 .证明拉格朗日 欧拉方法能够在定性上乃至在定量上准确地预报高分子复杂流体的流动行为 ,在描述真实的物理过程时是合理、准确的 To verify the accuracy of the Lagrange Eulerian method, a numerical simulation of the 2: 1 flow around a cylinder of a polymer solution was carried out. The PhanThien Tanner’s constitutive equation with a single relaxation time was used to obtain a PIB / C14 solution with De = 0 The calculated results of the flow around 93 are compared with those of the steady-state flow field measured by Baaijens et al., And the results show that the Lagrange Euler method Qualitatively, even quantitatively and accurately predicting the flow behavior of complex polymer fluids is reasonable and accurate in describing the real physical processes