Gas-liquid-solid three-phase flow simulation method

Abstract

The invention relates to a gas-liquid-solid three-phase flow simulation method, which is used for truly simulating movement tracks and deposition positions of solid particles in a hydraulic oil tank. The gas-liquid-solid three-phase flow simulation method comprises the following steps: setting simulation parameters of a liquid phase and a gas phase in FLEUNT, and performing gas-liquid two-phase steady-state simulation; setting solid phase simulation parameters in EDEM, keeping gas-liquid two-phase simulation data unchanged, switching a simulation mode to a transient state, and accessing a CFD-DEM coupling interface; and then, connecting the FLUENT and the EDEM through the coupling interface, performing gas-liquid-solid three-phase flow simulation, and ending the simulation until the simulation is in a complete steady state. The method has the advantages of being simple in parameter setting, high in accuracy, visual and understandable in simulation results, short in simulation period, high in efficiency, wide in application range, high in universality and the like.

Description

technical field [0001] The invention belongs to the technical field of hydraulic simulation, and in particular relates to a gas-liquid-solid three-phase flow simulation method. Background technique [0002] With the development of computer technology, Computational Fluid Dynamics (CFD) is widely used in fluid motion research. Through CFD simulation, parameters such as velocity, temperature, and pressure of the flow field can be effectively analyzed, which has important guiding significance for the design and optimization of the flow field structure. [0003] When the oil in the hydraulic system enters the hydraulic oil tank, it is often mixed with solid impurities and air bubbles, forming a multiphase flow. In order to study the multiphase flow in the hydraulic oil tank, simulation calculations are often required. [0004] At present, there are mainly Euler-Euler method and Euler-Lagrangian method for multiphase flow simulation. The Euler-Euler method focuses on a certain...

AI Technical Summary

Problems solved by technology

However, most of the existing three-phase flow simulation methods use the two-phase flow model and the discrete particle model (DPM) in the CFD simulation software FLUENT for simulation. This simulation method cannot fully consider the shape, size and force of the actual particles. Simulated as a regular sphere, although the shape coefficient can be set mathematically, it still cannot be close to the actual particle shape and size

Moreover, the DPM model only considers the force of oil on solid particles, ignoring the contact force between particles and between particles and the wall, which is inconsistent with the reality

In addition, from the simulation results, this method can only roughly simulate the trajectory of the particles in the hydraulic oil tank, and cannot accurately display and predict the final deposition position of the particles

[0007] Therefore, the existing multiphase flow simulation methods cannot truly simulate the real movement of particles in the hydraulic tank.

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