Enhancement of viscous grid projection algorithm and application

Overset on viscous grid is an important application of overset grid method. The projection algorithm for viscous grid is a crucial algorithm of viscous grid overlapping and has been extended to the cell-centered system. Some special handling is done to enhance the robustness of the projection algorithm. A steady DLR-F6 wing body flow is performed, and good agreement of computational results with experimental data has been achieved, showing that this algorithm has a strong applicability to complex geometry.