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Method for Eliminating Warpage in Interactive Prismatic Mesh Generation

A grid generation and interactive technology, applied in instrumentation, design optimization/simulation, calculation, etc., can solve the problems of increased algorithm difficulty and poor universality, so as to improve operating efficiency, improve universality, and reduce time cost consumption. Effect

Active Publication Date: 2021-05-07
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for eliminating warping phenomenon in interactive prism grid generation, aiming at the situation that the method for eliminating warping phenomenon by adding a space propulsion surface grid at the local position of the object surface grid has poor universality and increased algorithm difficulty, The smoothing method is used to smooth the advancing normal vector of the boundary point of the object surface grid, and eliminate the discontinuous amplification and propagation of the advancing normal vector of the boundary point of the object surface mesh, thereby avoiding the warping phenomenon of the prism grid, which can greatly improve the interaction Robustness and adaptability to complex shapes of prismatic mesh generation method

Method used

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  • Method for Eliminating Warpage in Interactive Prismatic Mesh Generation
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  • Method for Eliminating Warpage in Interactive Prismatic Mesh Generation

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[0042] 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.

[0043] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0044] This implementation combines Figure 1-Figure 2 , describe in detail the specific implementation process of the technical solution adopted:

[0045] In step (1), for a given object plane grid 1, use the boundary information to find out the boundary ridge line 2 of the object plane grid, and record the grid points on the boundary ridge line, that is, the object plane grid boundary network Grid.

[0046] Step (2): On the ridgeline of t...

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Abstract

The invention discloses a method for eliminating warping phenomenon in the generation of interactive prism grids, that is, firstly, the space advance grids of the boundary points of the grid of the object surface are artificially generated interactively, and then the smoothing algorithm is used to correct the boundary points of the grid of the object plane. Propel dharma in X , Y , Z The components in the three coordinate directions are smoothed, and then interpolated by the radial basis function method to obtain the space advancement grid of the internal points of the object surface grid, and finally assembled to obtain the boundary layer prism grid for CFD calculation simulation; the present invention is Optimize the advance surface grid of the boundary space of the object surface grid that has been artificially generated, and use technologies such as normal vector smoothing and radial basis function interpolation to eliminate the influence of warping on the quality of the prism grid, and improve the quality of the prism grid generation. In terms of efficiency and method universality, the present invention has obvious technical advantages.

Description

technical field [0001] The invention relates to the field of grid generation for numerical calculation, in particular to the field of prism grid generation in CFD (Computational Fluid Dynamics). Background technique [0002] With the rapid development of computer hardware technology and calculation methods, CFD (Computational Fluid Dynamics) plays an increasingly important role in scientific research and industrial product design, and is widely used in real flow of various complex shapes. Numerical Simulation. Especially in the field of aerospace, CFD has become an important tool for aircraft performance analysis and design. [0003] CFD discretizes the spatial flow field of the simulated object based on the grid, and then solves the discrete mathematical equation to obtain the numerical flow field of the simulated object under specific conditions. Discrete grid quality is a key factor affecting the efficiency, convergence and accuracy of CFD numerical solutions. A high-q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/28G06F113/08G06F119/14
Inventor 江盟孙岩孟德虹洪俊武黄勇李凯罗骁刘旺林
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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