Moving boundary problem calculation method based on OpenFOAM (Open source Field Operation And Manipulation) redevelopment
A technology of boundary problems and calculation methods, applied in the field of calculation of moving boundary problems, can solve problems such as the immature solver of OpenFOAM
Inactive Publication Date: 2018-09-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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[0005] For above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of calculation method based on OpenFOAM redevelopment of the dynamic boundary problem, to solve the problem that the solver of OpenFOAM for the problem of the dynamic boundary in the prior art is not mature yet , the present invention redevelops the computational fluid dynamics open source software OpenFOAM, improves its ability to solve dynamic boundary problems, and expands its application range
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[0040] The key of the redevelopment of OpenFOAM open-source software for computational fluid dynamics described in the present invention is to improve the ability of OpenFOAM to solve dynamic boundary problems and expand its application range by combining the immersion boundary method that accurately satisfies the boundary conditions.
[0041] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below, and the contents mentioned in the embodiments are not intended to limit the present invention.
[0042] A kind of moving boundary problem calculation method based on OpenFOAM redevelopment of the present invention comprises as follows:
[0043] For incompressible viscous flow problems, the governing equations in the Cartesian coordinate system (x,y,z) are written as:
[0044]
[0045] ▽ u=0 (2)
[0046] Among them, formula (1) is the momentum equation, formula (2) is the continuity equation; u is the velocity v...
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The invention discloses a moving boundary problem calculation method based on OpenFOAM (Open source Field Operation And Manipulation) redevelopment and relates to the technical field of computationalfluid mechanics. The capability that OpenFOAM solves a moving boundary problem can be improved and the application range thereof is broadened. The method comprises the steps of solving a flow field byuse of open source software OpenFoam of the computational fluid mechanics; and correcting a flow filed speed nearby the flow field through an immersed boundary method which precisely satisfies a boundary condition to finally achieve the purpose that the OpenFOAM can process the moving boundary problem. According to the moving boundary problem calculation method based on OpenFOAM redevelopment, onthe basis of the OpenFOAM, only the step of correcting the flow field speed needs to be increased, and thus the capability that the OpenFOAM processes the moving boundary problem is further improved.
Description
technical field [0001] The invention relates to the technical field of computational fluid dynamics, and specifically refers to a calculation method for dynamic boundary problems redeveloped based on OpenFOAM. Background technique [0002] In nature and engineering applications, moving boundary problems can be seen everywhere. Such as fish swimming in water, wind turbine blades rotating in the wind, and suspended particles moving in oil pipelines. To study the flow behavior of such problems, different methods can be used. Computational fluid dynamics (CFD) is one of the widely used methods because of its low cost, high efficiency, and repeatability. With the continuous development of numerical computing technology, commercial software for practical engineering problems has also emerged. Currently, commonly used CFD commercial software includes: Fluent, CFX, Star-CD, Phoenics, etc. They have been used to solve various types of fluid mechanics problems, have certain applic...
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CPCG06F30/20
Inventor 陈永亮南敬文吴杰王俊杰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS