Numerical simulation method for solid phase and liquid phase in rotating flow channel based on multiple reference systems

By adopting a multi-reference system method and a rotation coordinate system in the rotating flow channel, the problems of large computing resource consumption and inaccurate simulation results caused by grid update in the traditional method are solved, and efficient and accurate particle motion simulation under fixed grids are achieved.

CN120337829AActive Publication Date: 2025-07-18ZHEJIANG SCI-TECH UNIV
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Patent Information

Application Number
CN202510830309.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-20
Publication Date
2025-07-18
Estimated Expiration
2045-06-20

AI Technical Summary

Technical Problem

When the prior art simulates the solid-liquid two-phase flow in the rotating flow channel, frequent grid updates lead to high computing resources consumption, especially under high particle concentration or large-scale particle intervention conditions, the calculation efficiency is significantly reduced, and traditional methods cannot accurately characterize the local particle-fluid interaction, affecting the accuracy and engineering availability of simulation results.

Method used

The multi-reference system method is adopted to introduce a rotation coordinate system to the fluid domain and particles to achieve equivalent expression of the rotation effect, and the flow-solid coupling calculation is completed under a fixed grid, and the drag model is corrected to predict the particle motion trajectory and dynamic response, improving the simulation accuracy and stability.

Benefits of technology

Efficient simulation of particles in the rotating flow field is achieved under a fixed grid, reducing computing resource consumption, and improving the accuracy and engineering availability of simulation results.

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Abstract

The invention relates to the field of multiphase numerical simulation, and discloses a numerical simulation method for solid and liquid phases in a rotating flow channel based on multiple reference systems, which comprises the following steps of: firstly, acquiring a rotating flow field generated by a multiple reference system method, and extracting rotating domain information as well as particle information and fluid computational domain grid information in a current time step; secondly, particles in a rotation domain and particles outside the rotation domain are determined according to the rotation domain information and the particle information; in combination with the particle information and the fluid calculation domain grid information, the final flow field speed and the reconstructed porosity of the particles in the rotation domain and the particles outside the rotation domain are calculated respectively, and then the drag force is calculated according to the final flow field speed, the reconstructed porosity and the particle information; meanwhile, according to the particle information and the rotation domain information, the Korotkoff force and the centrifugal force of the particles in the rotation domain are calculated. Finally, drag force, Korotkoff force and centrifugal force are calculated through iteration, particle information and grid information of the next time step are obtained, and therefore numerical simulation calculation of particle motion in the rotating flow channel under the fixed grid is achieved.
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