Semi-Implicit Coupling of CS-FEM and FEM for the Interaction Between a Geometrically Nonlinear Solid and an Incompressible Fluid

被引:23
作者
He, Tao [1 ,2 ]
机构
[1] Shanghai Normal Univ, Dept Civil Engn, Shanghai 201418, Peoples R China
[2] Univ Birmingham, Sch Civil Engn, Birmingham B15 2TT, W Midlands, England
关键词
Fluid-structure interaction; arbitrary Lagrangian-Eulerian; semi-implicit coupling; smoothed finite element method; flow-induced vibrations; FINITE-ELEMENT-METHOD; PREDICTOR; ALGORITHM; SCHEME; MECHANICS;
D O I
10.1142/S0219876215500255
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A semi-implicit coupling strategy under the arbitrary Lagrangian-Eulerian description is presented for the incompressible fluid flow past a geometrically nonlinear solid in this paper. The incompressible fluid is solved by means of the characteristic-based split (CBS) finite element method while the cell-based smoothed finite element method is employed to settle the governing equation of the geometrically nonlinear solid. Because of the CBS fluid solver, the present coupling strategy is performed in a semi-implicit fashion. In particular, the first step of the CBS scheme is explicitly treated whereas the others are implicitly coupled with the structural motion. The computational cost is hence reduced because no subiterations are included in the explicit coupling step and the fluid mesh is frozen in the implicit coupling step. A classic cantilever problem is dealt with to validate the structural solver, and then flow-induced vibrations of a restrictor flap in a uniform channel flow is analyzed in detail. The obtained results agree well with the existing data.
引用
收藏
页数:16
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