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Method for simulating fluid flow

A fluid flow and numerical simulation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of increasing the difficulty, complexity and complexity of fluid flow simulation, avoid complex grid generation and improve efficiency Effect

Active Publication Date: 2008-12-24
北京网格天地软件技术股份有限公司
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Problems solved by technology

However, since the subdivision of regions under complex boundary shapes is itself a complex computational geometry problem, followed by finite element and finite volume methods are more complicated than finite difference methods, which increases the difficulty and complexity of fluid flow simulation

Method used

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  • Method for simulating fluid flow
  • Method for simulating fluid flow
  • Method for simulating fluid flow

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Embodiment Construction

[0048] Frequently encountered in life, such as the diffusion of oil leaked on the sea surface, the leakage of gas in buildings, the change and development of waves, and the formation and growth of crystals in the production process, the escape and rupture of bubbles in liquids , casting and injection molding processes, etc. are all about fluid flow motion interface issues. In order to formulate an effective rescue plan or ensure the quality of the product, it is important to carry out accurate and effective simulation of the above process, the above simulation is by solving the partial differential control equation - Eikonal equation: | ▿ u ( x ) | = 1 v ( x ) , x∈R n (where the boundary condition is u(x)=φ(x), x ∈ ...

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Abstract

The invention discloses a method used for simulating fluid flow, and the scope of the fluid flow comprises obstacles represented by irregular boundaries; the method is characterized in that: a structured grid of initial physical space is built, and evolved into a complex structured grid by applying treatment to the irregular boundaries one by one, and every irregular boundary is inserted into the complex structured grid as a zero iso-surface to obtain a complex invisible structured grid (CISgrid for short); a unit vertex of the CISgrid is used as a computational node, a finite difference method is adopted to carry out fluid flow numerical simulation according to node connected regulation. According to effective regulation inside the CISgrid, post-treatment of the fluid flow numerical simulation is carried out. The method solves the problem that the irregular boundaries can not be effectively treated when the fluid flow simulation is directly carried out with the structured grid and the finite difference method, avoids the problem of the introduction of the complex structured grid by the adaptation of an unstructured grid and the complex numerical computation based on the unstructured grid, and effectively improves the efficiency of the fluid flow simulation.

Description

technical field [0001] The invention relates to a method for simulating fluid flow. Background technique [0002] Frequently encountered in life, such as the diffusion of oil leaked on the sea surface, the leakage of gas in buildings, the change and development of waves, and the formation and growth of crystals in the production process, the escape and rupture of bubbles in liquids , casting and injection molding processes, etc. are all about fluid flow motion interface issues. In order to formulate an effective rescue plan or to ensure the quality of the product, it is important to carry out accurate and effective simulation of the above-mentioned process. Simulating this process involves modeling the fluid flow behavior and the boundary surfaces within the flow region. Prior art methods have used computational fluid dynamics, finite element analysis, finite difference methods to model the behavior described above. [0003] The finite difference method is an effective te...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 杨钦李吉刚孟宪海
Owner 北京网格天地软件技术股份有限公司
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