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A Novel Structured Mesh Generation Method

A grid generation and new structure technology, applied in the direction of instrumentation, geometric CAD, design optimization/simulation, etc., can solve the problems of wasting time, troublesome grid splicing, grid dependence on manual control, etc., achieve high calculation accuracy, reduce manpower the effect of dependence on

Active Publication Date: 2022-06-07
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional structural grid generation method can generate high-quality single-block structural grids for simple areas, but with the development of science and technology, it is necessary to solve more and more complex and fine models. The traditional method can only be the complex area first. Partition, and then generate grids separately. Grid splicing between different areas is very troublesome. Grid generation relies too much on manual control, which is a waste of time
In practical CFD engineering applications, it is often desirable to generate high-quality structural meshes conveniently and efficiently, but there is no effective method to automatically generate high-quality structural meshes

Method used

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  • A Novel Structured Mesh Generation Method
  • A Novel Structured Mesh Generation Method
  • A Novel Structured Mesh Generation Method

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Experimental program
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Effect test

Embodiment

[0041] The present invention generates structural grids based on the existing Delaunay triangulation technology. First, read the model data to obtain the discrete point set and boundary information of the calculation area; secondly, perform Delaunay triangulation on the calculation area; then, use the triangular mesh to generate the transition mesh: the optimized Voronoi diagram; finally, judge the transition mesh Element type, using the center circle method to divide the mesh element to generate a structural mesh.

specific Embodiment approach

[0043] First, through a specific data interface, read the data file of the model, then parse the data file, and then extract the discrete point set and boundary information of the computing area, and store it in the corresponding data structure for the next step. enter.

[0044] Generate a triangulated mesh:

[0045] (1) Input the discrete point set and boundary information of the computing area, construct a super triangle, including all discrete points, and put it into the triangle linked list;

[0046] (2) Insert the discrete points in the point set in turn, and find the triangle whose circumcircle contains the insertion point in the triangle linked list, which is called the influence triangle of the point; delete the common side of the influence triangle, and combine the input point with all the influence triangles. The vertices are connected to complete the insertion in a Delaunay triangle linked list;

[0047] (3) According to the optimization criterion, optimize the lo...

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PUM

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Abstract

The invention provides a novel structure grid generation method. The invention generates the structure grid on the basis of the existing Delaunay triangulation technology. First, read in the model data to obtain the discrete point set and boundary information of the calculation area; secondly, perform Delaunay triangulation on the calculation area; then, use the triangular grid to generate a transition grid: optimized Voronoi diagram; finally judge the transition grid Unit type, using the center circle method to subdivide the grid unit to generate a structured grid. The invention can realize the automatic generation of structural grids in complex areas, has higher calculation accuracy, and reduces the dependence on people compared with traditional methods. Delauny triangulation technology is a relatively mature unstructured meshing technology, which can efficiently and quickly generate adaptive and locally refined high-quality meshes for complex areas. This method uses a triangulated grid as the background grid, so it can also realize the self-adaptation and local refinement of the grid.

Description

technical field [0001] The invention relates to the technical field of preprocessing structural grid generation of computational fluid dynamics (CFD for short), in particular to a novel structural grid generation method. Background technique [0002] The automatic generation of structural meshes with two-dimensional complex shapes has always been one of the bottleneck problems hindering the application of CFD engineering. The traditional structural grid generation method can generate high-quality single-block structural grids for simple areas, but with the development of science and technology, more and more complex and refined models need to be solved. Partition, and then generate meshes separately, the mesh splicing between different areas is very troublesome, and mesh generation relies too much on manual control, which is a waste of time. In practical CFD engineering applications, it is often desirable to generate high-quality structural meshes conveniently and efficient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/30G06F30/18
CPCG06T17/30G06F30/20
Inventor 庞宇飞王子维齐龙胡月凡卢风顺黄尚坤缪涛陈波潘艳
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT