Method for solving CFD through structural/non-structural coupling

An unstructured and unstructured grid technology, applied in the field of fluid mechanics, can solve the problems of low computational efficiency, low efficiency, and a lot of manual labor, and achieve the effect of high precision.

Inactive Publication Date: 2016-11-09
赫新
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Problems solved by technology

[0003] At present, most CFD software either use structured grids or unstructured grids to discretize the computational domain, and use corresponding structural algorithms or unstructured algorithms respectively. These two algorithms have their own advantages and disadvantages: structured grids ( Algorithm) has high computational efficiency and high precision, but for complex geometric shapes, generating structured grids will consume a lot of manual labor; unstructured grids (algorithms) have the advantages of high degree of automation in grid generation and easy grid adaptation. However, compared with structured grids, there are problems of low computational efficiency and serious resource consumption.
However, at present, the hybrid grid is generally unstructured. This solution is inefficient, low-precision and takes a long time.

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  • Method for solving CFD through structural/non-structural coupling

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Embodiment Construction

[0017] In order to clearly understand the technical solution of the present invention, its detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, and there may be other implementations besides those described in detail.

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0019] The structure / unstructure coupling solution method proposed by the present invention, the main idea is to use the structure algorithm on the structure grid, and use the unstructure algorithm on the unstructure grid, and make the interface of the structure / unstructure grid compatible Sexual treatment, the main steps include:

[0020] Step 1: Generate a structured / unstructured hybrid grid. ...

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Abstract

The invention discloses a method for solving CFD through structural / non-structural coupling. The method for solving CFD through structural / non-structural coupling includes the following steps that S1, a structural / non-structural hybrid grid is generated; S2, the hybrid grid is partitioned according to the efficiency of a structural resolver and a non-structural resolver; S3, the structural resolver and the non-structural resolver are called for CFD calculation. According to the method, when CFD is solved based on the hybrid grid, the problem that structural algorithm advantages can be lost in an existing method is solved, the flexibility of a non-structural grid can be exerted, and the advantages of high efficiency and high precision of a structural grid can be fully exerted.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics, and in particular relates to a method for solving CFD through structural / non-structural coupling. Background technique [0002] With the continuous development of large-scale scientific computers, Computational Fluid Dynamics (CFD) has gradually matured and has been widely used in the design process of industrial products. An important symbol of the development of CFD technology is that various CFD software have appeared one after another in the past ten or twenty years. The core function of CFD software is to obtain the flow field information by solving the N-S flow control equation, which mainly includes three steps: first, discretize the calculation domain by using calculation grid units (such as triangles, quadrilaterals, tetrahedrons, hexahedrons, etc.); The fluid governing equations are solved by computational mathematics on the grid; finally, the required information is extracted ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 赫新
Owner 赫新
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