Disturbance domain propelling method for incompressible flow

Abstract

The invention relates to the technical field of computational fluid mechanics, and provides an incompressible flow disturbance domain propulsion method, which comprises the following steps of: establishing an initial incompressible flow computational domain and an initial flow field based on an incoming flow speed; on the basis of the initial flow field, first-step iteration is carried out through an SIMPLE method, and an updated velocity flow field and an updated pressure flow field are obtained; secondly, the local grid residual calculated through iteration in the first step serves as numerical disturbance, and disturbance domain propelling is conducted through judgment of the positions of grid units and the distance between the grid units and the wall face of an object; and after the disturbance domain is propelled, next iterative loop is carried out, and a convergent solution is obtained. According to the method, by establishing the dynamic disturbance domain changing along with the convergence progress, invalid calculation in the single iteration process is reduced, waste of a large number of calculation resources is avoided, and the calculation efficiency of incompressible flow numerical simulation solving is improved.

Description

technical field [0001] The invention relates to the technical field of computational fluid dynamics, in particular to a perturbation domain propulsion method for incompressible flow. Background technique [0002] Computational fluid dynamics is a branch of computational science that focuses on solving the governing equations of fluid mechanics. Scientists and engineers often use computational fluid dynamics methods to obtain quantitative information about fluid motion, such as the value of parameters such as velocity, pressure, density, or temperature at different locations in the flow field under specific conditions. When the velocity is relatively low, the above-mentioned fluid mechanics control equation is an incompressible Navier-Stokes equation. The physical parameters to be solved mainly include velocity and pressure, and the mainstream algorithm for solving this equation is SIMPLE (Semi-Implicit Method). for Pressure-Linked Equations) series of algorithms represented...

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Problems solved by technology

[0005] In view of this, the present invention provides a perturbation domain advancement method for incompressible flow to solve the problems in the prior art that the invalid calculation in a single iteration process and the calculation efficiency of numerical simulation solution for incompressible flow cannot be improved

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