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Data storage structure and data storage method of unstructured grid

An unstructured grid and data storage technology, applied in the field of information storage, can solve the problem of not being able to find two-dimensional or three-dimensional unstructured grid data structures and storage methods, and achieve the advantages of simple data storage methods and adaptability , the effect of simplifying the amount of data

Pending Publication Date: 2020-12-01
西安数峰信息科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, unlike structured grids, unstructured grids have a definite connection between each unit, so it is necessary to design a special data structure for storage. In the prior art, there is no one that can fully describe two-dimensional or three-dimensional Detailed Data Structure and Storage Method of Unstructured Grid

Method used

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  • Data storage structure and data storage method of unstructured grid
  • Data storage structure and data storage method of unstructured grid
  • Data storage structure and data storage method of unstructured grid

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Embodiment 1

[0054] by image 3 The computational grid in the present invention is used as an example to illustrate the data structure of the grid center, grid surface, and grid point in the two-dimensional unstructured grid in the present invention, and each list forming the grid data structure.

[0055] image 3 In , the calculation area is divided into 9 triangles. The grid consists of 9 grid cells (centroids), 17 grid faces and 9 grid points. Among them, the arrow indicates the direction of each grid; the numbering of all lists starts from 0. Table 6, Table 7, and Table 8 respectively illustrate the topological information of the three basic grid components by taking grid center #1, grid surface #7 and grid point #7 as examples. Table 9 is image 3 Calculate individual linear lists in the grid data.

[0056] Table 6 Topological information of grid center #1

[0057] List of adjacent square numbers: 1,8,9 Adjacent grid number list: 1,2,7

[0058] Table 7 Topolo...

Embodiment 2

[0066] The fluid dynamics simulation software developed by adopting the data storage structure of the unstructured grid of the present invention can efficiently store all the geometric information of the three-dimensional unstructured grid. For example, Figure 4 (a) is a three-dimensional geometric structure of an engine blade; Figure 4 (b) is a spatial discretization map of an unstructured grid of the engine blade.

[0067] In addition, the fluid dynamics simulation software developed by the data storage structure of the unstructured grid written by the present invention can support various types of grid shapes, and can read the data generated by different software such as ICME, Gambit, Star-CCM, and Ugrid. Generated computational grid. For example Figure 5 The four pictures from left to right in the figure are 2D triangular mesh, 3D hybrid mesh, 3D hexahedral mesh, and 3D polyhedral mesh.

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Abstract

The invention belongs to the field of information storage, and discloses a data storage structure and a data storage method of an unstructured grid, and the data storage structure comprises geometrical information and topological information of a grid unit, geometrical information and topological information of a grid surface, geometrical information and topological information of grid points, anda grid surface area; wherein the grid surface area comprises an internal grid surface area and a boundary grid surface area; the data storage structure of the unstructured grid provides a detailed spatial discretization solution for software development of computational fluid mechanics and computational structural mechanics, can support various grid types involved in numerical calculation of a finite volume method and a finite element method, and can also support simulation calculation of two-dimensional and three-dimensional problems at the same time; the data storage method is simple, the data volume can be simplified, the calculated amount is reduced, and the method has remarkable advantages in adaptability of complex geometrical shapes.

Description

technical field [0001] The invention relates to the field of information storage, in particular to a data storage structure and a data storage method of an unstructured grid. Background technique [0002] In the early fluid mechanics simulation software, the spatial discretization mainly adopts a structured grid, that is, each unit has fixed surrounding neighbor units. Structured grid data structure and corresponding storage technology are relatively simple, but poor adaptability to complex geometric spatial shapes. Due to its ability to adapt to various complex geometric shapes, unstructured grids have become the most important spatial discretization solution in fluid dynamics simulation software. However, unlike structured grids, unstructured grids have a definite connection between each unit, so it is necessary to design a special data structure for storage. In the prior art, there is no one that can fully describe two-dimensional or three-dimensional Detailed data stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/22G06F30/28G06F113/08G06F119/14
CPCG06F16/22G06F30/28G06F2119/14G06F2113/08
Inventor 凌空
Owner 西安数峰信息科技有限责任公司
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