Towards straightforward use of cell-based smoothed finite element method in fluid-structure interaction

This paper presents a straightforward implementation of cell-based smoothed finite element method (CS-FEM) into fluid-structure interaction from the arbitrary Lagriangian-Eulerian perspective. Identical to the practice in solid mechanics, CS-FEM is directly applied to viscous stress and pressure Poisson equation in fluid problem. Minimum programming efforts are thus required to modify existing in-house codes. Following an efficient grid moving strategy, partitioned implicit coupling scheme based upon fixed-point iterations is adopted to interconnect individual fields. The proposed approach is validated against previously published data for several benchmarks. Visible improvements are exposed in predicted results along with flow-induced phenomena.