Numerical Method for Simulating Unsteady Flow Including Solid/Fluid Interaction

摘要

A new thin-layer Navier-Stokes solver for time-dependent compressible flows hasbeen developed. The implicit, temporally second-order accurate formulation facilitates the simulation of flows at high Reynolds numbers. The effects of turbulence can be taken into account by applying algebraic or two-equation turbulence models. Complex, arbitrarily deforming geometries can be handled using fully conservative multi-block structured grids. An iterative time-stepping utilizing a multigrid technique maintains the temporal and spatial accuracy of the basic scheme also at grid block interfaces and solid boundaries. The flow solver has been coupled with an interactive time integration of the structural deformations of the geometry under study. The explicit second-order accurate scheme enables an easy and efficient treatment of the structural model, where non-linearities can be handled in a straightforward manner.