A CBS-based partitioned semi-implicit coupling algorithm for fluid–structure interaction using MCIBC method

摘要: Abstract The characteristic-based split (CBS) scheme has been extensively utilized to address the fluid subproblem within fluid–structure interaction (FSI) analyses over past decade. To cope with FSI, this article develops a CBS-based partitioned semi-implicit coupling algorithm where CBS serves not only for component but also entire algorithm. At each time instant, first step of is explicitly treated together mesh movement, while remaining two steps are implicitly coupled structural motion on frozen temporarily. retrieve style, mass source term iteratively updated in pressure Poisson equation elements adhering interface. present provides stabilized solution Navier–Stokes equations and computational reduction without stability drop, thus inheriting virtues projection-based method. Within our algorithm, FSI achieved by modified combined interface boundary condition (MCIBC) method which re-derived more concise fashion. A weak implementation MCIBC proposed avoid deteriorating numerical results. rectifies limitations its original counterpart, making itself applicable fluid–rigid/flexible body interaction. Flow-induced vibrations various bluff bodies analyzed test feasibility methodology. overall results agree well existing data, demonstrating validity applicability approach.