Automatic generation method for boundary layer grid of structured grid

An automatic generation and boundary layer technology, applied in image generation, image data processing, special data processing applications, etc., can solve the problems of wide application in the field of grid generation, strong constraints, etc., to promote wide application and lower the threshold Effect

Pending Publication Date: 2018-03-13
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned defects of the prior art, and propose a method for automatically generating boundary layer grids of structural grids, which is used to generate high-quality boundary layer grids conveniently and efficiently, and solve the problems of various current problems. The boundary layer mesh generation algorithm has strong constraints and cannot be widely used in the field of mesh generation

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  • Automatic generation method for boundary layer grid of structured grid
  • Automatic generation method for boundary layer grid of structured grid
  • Automatic generation method for boundary layer grid of structured grid

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[0027] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0028] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0029] The present invention is based on the existing surface grid, firstly, extracting its geometric features, and after extracting the geometric features of the object plane grid, calculates the normal vector of the object plane, the focus of the calculation of the normal vector of the object plane is to process Convex corners (such as the trailing edge of the wing, etc.), concave corner areas (such as the joints between components) and other unconventional situations; secondly, with the help of the geometric features extracted above, construct the boundary layer mesh frame; finally, based on The overlimit i...

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Abstract

The invention discloses an automatic generation method for a boundary layer grid of a structured grid. The method is characterized by comprising the following steps of 1, performing geometric featureextraction on an existing object surface grid; 2, constructing a boundary layer grid framework based on extracted geometric features; and 3, generating the whole boundary layer grid based on the boundary layer grid framework based on a transfinite interpolation method. Differing from the technical characteristics of inside-out and gradual advance of boundary layer grid generation of a gradual advance method, an overall geometric feature structure-based boundary layer grid generation method is adopted; and the difference, from the conventional advance method, of the method is that the comprehensive adaptability to the overall boundary layer in a complicated shape is relatively high and the constraints on the local details of the grid are relaxed.

Description

technical field [0001] The invention relates to the technical field of preprocessing structural grid generation of computational fluid dynamics, in particular to a method for automatically generating boundary layer grids of structural grids. Background technique [0002] The computational grid generation of viscous flow with complex shapes has always been one of the bottlenecks hindering the application of CFD engineering. Because the calculation of viscous flow requires high orthogonality of wall grids, and various complex geometric shapes in engineering applications, A variety of constraints that restrict each other and are difficult to reconcile are often put forward for the grid generation of the boundary layer, which makes the grid generation overly dependent on manual control and takes a lot of time, which has become a technical difficulty in the current complex shape grid generation. In practical CFD engineering applications, it is often desired to generate high-quali...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06F17/50
CPCG06F30/20G06T15/005G06T2210/24
Inventor 卢风顺庞宇飞齐龙黄尚坤胡月凡
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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