Orthogonal block structured surface grids

Abstract

Abstract One of the main issues in grid generation is the improvement of the grid quality, both for structured and unstructured meshes. In the present work we focus our attention on the generation of structured grids. It is important to develop structured grid generation systems able to give “good” grids in topologically complex regions, because in this way it is possible to reduce the effort of block decomposition, with considerable improvement of the flow solver efficiency. By “good” meshes, we mean grids sufficiently smooth, and orthogonal along part of the boundary (for example along solid walls). Moreover, along the interior boundaries connecting different blocks, it is advisable to have the possibility of controlling both the grid point positions and the slope of the coordinate lines. The aim of this work is to present a mesh generation method for structured grids, able to solve the main issues pointed out above, specifically: a) smoothness, b) orthogonality control, c) specification of the grid point position and coordinate line slope along each boundary at the same time.