Abrasive particle flow field analysismethod based on CFD-DEM coupling model

Abstract

The invention discloses an abrasive particle flow field analysis method based on a CFD-DEM coupling model. The method comprises the following steps of (1) building and solving an abrasive particle processing-oriented fluid phase control equation set, (2) solving an abrasive particle motion equation through a DEM theory according to a solution result achieved in the (1) step, (3) updating a position of the abrasive particles in a flow path according to the abrasive particle motion equation, and solving a new volume fraction and action force applied to the abrasive particles, (4) substituting a new fluid volume fraction and the action force applied to the abrasive particles to the (1) step for a new round calculation, continuously updating speed and position of each abrasive particle in a circulating way according to the above calculation process to evolving the whole abrasive particle flow processing system to achieve an abrasive particle flow motion rule. A method combining a computational fluid mechanics model and a discrete element theory model is introduced to the abrasive particle flow processing field; precise analysis can be conducted to abrasive particle movements; and abrasive particle processing technology parameters can be accurately adjusted and controlled.

Description

technical field [0001] The present invention relates to the technical field of precision finishing, and more specifically, relates to a method for analyzing abrasive particle flow field based on a CFD-DEM coupled model. Background technique [0002] Precision finishing technology is an important supporting technology for the development of modern industry. Among them, the fluid-based abrasive flow machining technology has incomparable advantages in some processing occasions due to the use of flexible fluids. Traditional abrasive flow processing can be generally divided into two categories, one is the traditional extrusion abrasive flow processing technology using strong viscosity fluid for extrusion processing, such as extrusion honing; the other is the use of weak viscosity or no Abrasive flow processing technology for viscous fluids, such as abrasive jet processing, elastic emission polishing, float polishing, chemical mechanical polishing and magnetorheological polishing...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that it is difficult to accurately analyze the abrasive flow movement in the existing abrasive flow processing, and then it is difficult to accurately control the processing parameters, and provides a method that introduces the discrete element model into the CFD model and solves the problem through numerical calculation. The abrasive flow field analysis method based on the coupled model can effectively analyze the movement of abrasive particle flow in the entire flow field, and then realize the precise control of abrasive flow processing.

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