Lift and drag prediction using automatic hexahedra grid generation method

To shorten the time to simulate flow, we develop an automatic and fast grid generator, HexaGrid, that produces Cartesian/prism hybrid grids. Since the prism cells are also hexahedra, the generated grid is hexahedron-dominant. The objective of this study is to extend the method so that it can produce grids with sufficient quality for Navier-Stokes simulation. The transonic flows around ONERA-M6 wing and DLR-F6 wing-body configuration are computed using HexaGrid and an unstructured-grid flow solver, JTAS. The lift and drag computed with the grid are compared with others’ results. The agreement is reasonably good, which shows that HexaGrid becomes a powerful tool to accelerate a CFD process.