Prismatic grid generation method with realization of interactive operation

Abstract

The invention discloses a prismatic grid generation method with the realization of an interactive operation. A bold background structure grid frame is generated by using a transfinite interpolation technique, then a mapping relation is established between an object surface grid node and the background structure grid frame, through adjusting the background structure grid frame, the growth area, the growth direction and the growth speed of a prismatic grid are controlled, and the rapid and efficient generation of the prismatic grid is realized according to artificial interaction. Through the implementation of the method, the growth directions of the prismatic grid do not cross, the success growth of the prismatic grid is ensured, the background structure grid frame is modified through the artificial interaction, the local control and adjustment of the prismatic grid are realized, and the quality of the generation of the prismatic grid is improved.

Description

technical field [0001] The invention relates to the field of grid generation in computational mechanics, in particular to the grid generation of external flow fields in computational fluid dynamics and a prism grid generation method capable of realizing interactive operations. Background technique [0002] A high-quality discrete grid is the basis for obtaining accurate CFD (Computational Fluid Dynamics, CFD) calculation results. At present, although some efficient commercial grid division software has appeared, grid generation still accounts for about 60% of the CFD workload. Efficient and high-quality meshing is still one of the key research issues facing CFD applications. [0003] Triangular or tetrahedral meshes can automatically fill any two-dimensional or three-dimensional area, and realize the fully automatic generation of meshes with arbitrary complex shapes. However, triangular or tetrahedral meshes are incapable of simulating high Reynolds number boundary layer flo...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the advancing normal vector of the complex shape surface is difficult to control in the normal advancing method, it is easy to cause the crossing of the advancing direction and the mesh volume is negative, which leads to the failure of mesh generation, the pre-generated background structure mesh frame is used to control the surface mesh Propel direction, to ensure that the node propulsion direction does not intersect during the generation of the prism grid, and the grid does not have a negative volume, ensuring the success of the prism grid generation;

[0009] Aiming at the problem that the single-layer grid unit generated by the forwarding is not smooth due to the change of the forward step size in the normal push method, and the grid quality is low, the background structure grid frame is used to control the shape of the single-layer grid unit to ensure that the generated prism network grid with high mesh quality

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