Acceleration of CFD simulation preparation by surface mesh simplification in LOGOS software package

The article describes a new surface triangular mesh simplification algorithm. The simplification algorithm is applied as one of preparation stages of a high-quality surface mesh generation, which is a base for computational mesh generation in LOGOS software package. Simplification of the initial model represented as a set of triangular cells makes it possible to speed up the preparation of the final surface mesh without its quality degradation and, consequently, it leads eventually to faster computation mesh generation and simulation of physical processes. Simplification algorithm executes maximum allowable cells reduction to speed up the next stages of mesh generation. Introduced constraints enable the control over the surface curvature changes with the account for the user-set sizes, the deviation from the initial model, modified cells quality, etc. A new approach is proposed to simplify surface meshes in the context of computation model generation for CFD simulations with a possibility of parallel running using OpenMP means on given boundaries with preliminary simplification of sets of curves separating them.