Implicit algorithm based on dynamic hybrid mesh for incompressible unsteady flows

An implicit solver for incompressible unsteady flows is presented,based on the dynamic hybrid mesh proposed by the authors previously. Thesolver is based on an artificial compressibility method with dual-timestepping for time advancing. To accelerate the convergence insub-iterations, we use a block LU-SGS coupling with the multi-gridtechnique based on hybrid grids. Several typical cases are simulated tovalidate the flow solver. The numerical results show the efficiency andaccuracy of the solver for incompressible unsteady flows.