Effect of Pressure Oscillation in Fluids on Structure by MPS Method

For unreal pressure oscillation in fluid particles due to MPS method, two algorithms which corrected the source term in the Poisson equation are compared with original MPS method. In addition, wave boundary condition is improved to generate solitary wave by a wave maker with piston type. The incident wave heights are compared to experimental data. In dynamic analysis of fluid-structure interaction problems, the influence of pressure oscillation on the structure deformation and the fluid force is investigated in detail. As a result, although it was indicated that the two algorithms restrain the pressure oscillation, their coefficients suited to numerical conditions will be required. Further, we made clear that the oscillation of pressure strongly affects the structure deformation because the fluid force does not accurately act on the elastic body.