Three kinds of results are obtained by simulation calculating the two models : the composed vector diagrams of the axial velocity ( v ) and the radial velocity ( vr ) at the different times in the symmetry section ; diagrams of curves of the velocity vector ( v ^ ) and ( vr ) at the different times in the different sections ; diagrams of the secondary flow vectors at the different times in the different sections 我们对两种不同直径的s型血管进行了有限元模拟计算，得到三种结果：在对称面内不同时刻的轴向速度v _和径向速度v _ r的合成矢量；在不同截面不同时刻的速度分量v _和v _ r的曲线图；在不同截面不同时刻的二次流的矢量图。
