変形する微生物周りの流れ解析

抄録

We conducted the numerical analysis of the flow near the deforming microorganism, which motion is dominated by the viscous forces mainly, and investigated the basic behavior of the drag force anting on the microorganism. In this problem, the boundary conditions change with time. So, we adopted the ALE method and finite element method to solve the moving boundary problem. As a result, we can find that the average drag coefficient is decreased with the increase in the Strouhal number under the condition of the fixed trailing edge. On the other hand, we can find that the averaged drag coefficient is increased with the increase in the Strouhal number under the condition of the fixed leading edge. There results means that the deformation pattern has an important role on the drag force. Furthermore, it was found that the average drag coefficient becomes the negative value under the condition of the fixed trailing edge and the Strouhal number of 40 or 50.