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Multiphase flow calculation method

A calculation method and multiphase flow technology, applied in the field of multiphase flow calculation, can solve the problems of large number of calculation particles, consumption of calculation time and calculation performance, etc.

Active Publication Date: 2020-06-05
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the number of calculated particles in these methods is too large, which consumes a lot of computing time and computing performance.

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Embodiment Construction

[0095] The invention provides a calculation method for multiphase flow, based on the internal interpolation / multi-moment finite volume method in the Euler method and the finite volume particle method in the Lagrangian method, combined with the actual numerical simulation calculation, the Euler method is useful for multiphase flow The difficulty of capturing the phase flow interface and the time-consuming calculation of the Lagrangian method significantly reduce the number of particles in the Lagrangian method by arranging the particles of the Lagrangian in a few layers of grids near the phase interface number, and avoids the trapping of phase boundaries in the complex Euler method. The hybrid method combines the advantages of the grid method and the Lagrangian method. It tracks the movement of the phase interface by calculating the motion of the particles through the moving particle method, so the phase interface is automatically determined by the particle distribution calculat...

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Abstract

The invention discloses a multiphase flow calculation method, which comprises the following steps of: firstly, determining a calculation region, and inputting physical property parameters and corresponding boundary conditions; solving a convection equation of an Euler part by using a constrained interpolation on-duty constant semi-Lagrange method; solving a pressure Poisson equation of a non-convection part of a grid part, updating a numerical value of the next time step of the grid part, transmitting a speed of the grid part to particles for correction to obtain a new particle position, and acquiring a grid color function value near an interface according to the particle position; and completing multi-phase flow numerical simulation calculation if the simulation time is reached. The multiphase flow calculation method has the advantages of accuracy of tracking the phase interface by adopting a particle method and rapidity of the grid method. The multiphase flow calculation method is suitable for multi-phase flow motion under the condition of not including heat transfer, and the advantages of the multiphase flow calculation method can be brought into full play when the phase interface changes drastically and the calculation region is large.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics, and in particular relates to a multiphase flow calculation method. Background technique [0002] Multiphase flow is a complex flow phenomenon, which widely exists in petroleum, chemical industry, metallurgy, power and energy and other industrial fields. The study of multiphase flow is of great significance to the progress of science and technology in related industries. In the numerical simulation of multiphase flow, capturing the phase interface is the key and difficult point. In order to solve the problem of phase interface capture in the traditional Euler method, many phase interface tracking and reconstruction methods have been developed, such as VOF, Level Set method, Front-Tracking and VOSET method. However, these methods will lose the details of the phase interface in the process of reconstructing or constructing the phase interface, and require complex mesh division operations, w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/25G06F30/28G06F119/14
Inventor 张斌张盛丰刘晓星单建强
Owner XI AN JIAOTONG UNIV
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