Dissipative particle dynamics simulation method for grinding liquid particle characteristics

Abstract

The present invention relates to a dissipative particle dynamics (DPD) simulation method for grinding liquid particle characteristics. The specific steps of the method are as follows: (1) carrying out DPD particle analysis and calculation for a single grinding liquid particle: selecting a silicon carbide particle in grinding liquid to perform analysis, and establishing a DPD particle model of the silicon carbide particle; (2) carrying out DPD particle analysis for different numbers of the grinding liquid particles: selecting 100, 200 and 300 DPD particles to perform simulation comparison, and stablishing the DPD particle model of each particle to perform DPD simulation on the particles; and (3) making a simulation conclusion: by means of DPD analysis on the grinding liquid particles, curves of the density, pressure, temperature and the like of the single DPD particle better coincide with a theoretical value. According to the method, understanding and cognition of grinding liquid particle behaviors can be effectively implemented, grinding liquid particle characteristic research and use effects are improved, better application to mechanical processing is facilitated, and better control and use are facilitated.

Description

technical field [0001] The invention relates to a method for simulating the dynamics of dissipated particles of grinding liquid particle characteristics, and belongs to the technical field of mechanical processing simulation. Background technique [0002] The abrasive liquid is a solid-liquid two-phase mixture formed by mixing a viscoelastic, soft and cutting semi-solid carrier and a certain amount of abrasive. In two-phase flow, there is an interaction between solid and liquid, and solid particles move under the action of fluid. Due to the driving effect of the fluid phase, abrasive particles collide with each other, and between abrasive particles and the surface of the part. , so that the wall is constantly worn by impact and friction. This wear is the grinding effect of abrasive grains on the processed surface. Studying the dynamic characteristics of abrasive particles has practical significance for the control of viscosity, temperature, pressure, etc. of abrasive flow ...

AI Technical Summary

Problems solved by technology

Although molecular dynamics has achieved considerable success in simulating a small number of molecular systems, due to the limitation of computer speed, the time and space scales that molecular dynamics can calculate are still limited to nanoseconds and nanometers.

However, the static and dynamic physical characteristics directly related to the flow performance of the abrasive fluid system are often at the millisecond and micron-scale space-time scale, that is, the mesoscopic scale. When molecular dynamics is used to simulate complex fluids, the huge demand for calculation makes the simulation work not currently available

Images