Comparison of ISPH and WCSPH methods to solve fluid-structure interaction problems

Abstract

In this paper, the in-house code based on the smoothed particle hydrodynamics is proposed to simulate a Fluid-Solid Interaction (FSI) problem. This method is a Lagrangian, mesh-free method, and it has a high ability to capture the free surface in two-phase ows and also the interface in FSI problems. To compare Weakly Compressible SPH (WCSPH) and Incompressible SPH (ISPH) schemes, uid ow under a hypo-elastic gate is simulated in solid and uid domains with both methods. At rst, uid domain is simulated with ISPH method and solid domain is solved with WCSPH scheme. Another simulation is done with both uid and solid parts solved by WCSPH method. The results of both methods are in good agreement with each other and also with other researcher's results. So, it is concluded that it is easier to model the uid ow with ISPH scheme and the solid part with WCSPH in coupling uid-solid interaction problems with good accuracy.