Vorticity refinement used in numerical simulation of incompressible swirling flow field

A numerical simulation and vorticity technology, applied in the numerical field, which can solve problems such as the inability to be further improved, the uncertainty of the stability of convergence, etc.
CN102682192BInactive Publication Date: 2015-05-20TIANJIN AEROCODE ENG APPL SOFTWAREDEV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN AEROCODE ENG APPL SOFTWAREDEV
Publication Date
2015-05-20
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a numerical simulation method for the vortex motion of an incompressible flow, being called as vorticity refinement. According to the characteristics of the incompressible flow, two different forms of forces are added to a momentum equation so that the precision of the numerical simulation of a flow field based on the vortex motion. The two forms of forces are respectively a spiral force and a viscous dissipation force of vorticity in the varying gradient direction. The numerical simulation method leads the integral computation of the spiral force of the vorticity in a computational grid in the varying gradient direction to be converted into the flux computation of a superior force on a boundary of the computational grid and can lead the spatial dispersion of the superior force to have a high-order accuracy format; simultaneously, a source item of the momentum equation reserves the viscous dissipation force of the vorticity in the varying gradient direction for increasing the convergence and stability of a numerical solution. The two forces adopt different amplification coefficients so that the accuracy of the vorticity can be further remained, and the vortex motion in the flow field can be more accurately simulated.
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Description

technical field

[0001] The invention relates to a numerical method in the field of computational fluid dynamics (CFD: Computational Fluid Dynamics), in particular to a vortex maintenance technology used in the numerical simulation of the incompressible swirl field of a delta wing. Background technique

[0002] Computational Fluid Dynamics combines fluid mechanics, applied mathematics, and computer science, and is a subject with strong applicability. Numerical simulation of fluid mechanics problems occupies an important position in various related fields such as the exploration of the mechanism of fluid flow and the design of industrial products due to its advantages of low cost and strong intuition. One of the biggest problems and challenges facing computational fluid dynamics is how to improve the accuracy of numerical simulation, reduce errors, and faithfully represent the characteristics of fluid flow.

[0003] One of the important factors affecting the accuracy of numer...

Claims

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