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A Dynamic Mesh Method Based on Background Mesh

A technology of moving grids and grids, applied in the field of moving grids, can solve problems such as huge amount of calculation and difficult application.

Active Publication Date: 2019-05-10
BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] When radial basis function grid deformation technology is used, if the number of volume grids reaches millions or even tens of millions, when the deformation of the boundary grid is interpolated to the volume grid through the radial basis function, the amount of calculation will be very large. Difficult to apply in engineering

Method used

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  • A Dynamic Mesh Method Based on Background Mesh
  • A Dynamic Mesh Method Based on Background Mesh
  • A Dynamic Mesh Method Based on Background Mesh

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Embodiment Construction

[0043] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] The invention adopts the radial basis function method to deform the sparse background grid, and then interpolates the deformation amount of the background grid to the grid points of the original body grid, thereby achieving the purpose of improving the efficiency of the dynamic grid. The background grid of the present invention is only used to insert the deformation amount back to the original volume grid, so it is not required that the background grid coincides with the boundary of the original volume grid, so that a simple rectangular grid that can be automatically generated can be used As a background grid, human intervention is greatly reduced, and the quality of the deformed grid is still high.

[0045] A kind of moving grid technology based on background grid of the present invention comprises the follow...

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Abstract

The invention belongs to the technical field of moving grids for structured grids, structured / non-structured hybrid grids and point cloud, and particularly relates to a background grid based moving grid technology. According to the moving grid technology, a sparse background grid is deformed by adopting a radial basis function and then a deformation amount of the background grid is interpolated to a grid point of an original body grid so as to achieve the purpose of improving the moving grid efficiency. The background grid is only used for interpolating the deformation amount to the original body grid, so that the boundaries of the background grid and the original body grid are not required to be matched, a simple Cartesian grid capable of being automatically generated can be adopted as the background grid, the manual intervention is greatly reduced, and the quality of the deformed grid is still relatively high.

Description

technical field [0001] The invention belongs to the technical field of dynamic grids for structured grids, structured / unstructured hybrid grids and point clouds, and in particular relates to a dynamic grid technology based on background grids. Background technique [0002] Dynamic mesh technology is widely used in aerodynamic shape optimization design, unsteady flow simulation and aeroelasticity simulation. Efficient moving mesh technology is one of the key technologies to solve such problems, and it is also the most important technical "bottleneck" in realizing engineering applications. There are three main types of moving mesh technology: rigid moving mesh technology, overlapping moving mesh technology, and mesh deformation technology. The invention belongs to the dynamic grid technology of the grid deformation class. [0003] At present, the dynamic mesh technology of mesh deformation is generally divided into structured mesh deformation technology and structured / unstru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/30
Inventor 方洪闵昌万禹彩辉张星王玲郑昭虎龚春叶高鹏郭灵犀
Owner BEIJING LINJIN SPACE AIRCRAFT SYST ENG INST
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