Automatic structured mesh generation around two-dimensional bodies defined by polylines or PolyC1 curves

The need for automatic mesh generation techniques in Computational Fluid Dynamics is widely recognized. The decomposition of the computational domain into off-body Cartesian regions and near-body regions has proven to be a robust approach. This paper investigates a method to generate automatically structured near-body grids around two-dimensional bodies for CFD simulations. This method enables to avoid poor-quality meshes for locally sharp bodies, such as the trailing edge of an airfoil and is able to perform automatically flow simulation around any geometry made of polylines or polyC1 curves. The method is validated on the laminar flow simulation past a rectangle with a cavity, and then on the RANS flow simulation past a RAE2822 airfoil. Solutions are compared to reference solutions obtained with classical multiblock meshes. Finally, this technique is applied on the RANS flow simulation past a three-element airfoil, showing the robustness of the present method to generate automatically a mesh around a complex configuration.