The Simulation Of Multi Physical Field Coupled Electrochemical Machining Considering Bubble

Magnetic field assisted electrochemical machining is a multiple physical fields coupling process, the low content of solid particles can be ignored in the flow field of multiple physical fields.It is composed of a gas-liquid two-phase,In addition to flow field, there is also electric field,magnetic field and temperature field in multiple physical fields.In the conventional simulation analysis of magnetic field assisted electrochemical machining,the simulation research of multiple physical fields is less, and yet there is no flow field coupled multiple physical fields simulation of two-phase flow.This paper considers the flow field constituted by the gas-liquid two phase with electric field and magnetic field,and researches the influence of magnetic field on the electrolytic machining through simulation analysis. And, at the micro angle,this paper discussed the sport of single charged particles and bubbles in the magnetic field.The study of gas-liquid two-phase used three dimensional physical model under different magnetic field placed way,considering of the gas from the cathode in electrolytic machining, mathematical model and finite element model of two-phase flow in the gap of electrolytic machining was established,using Comsol Mutiphysics,this paper simulated the flow rate of the liquid phase and the distribution of the bubble in the flow field with different magnetic field,and analyzed the influence of magnetic field to gap-flow field.research shows,at low flow rates,as the electromagnetic force,the Liquid is annular distribution and the bubble is stirring like distributed. At higher flow rates,the effect of electromagnetic force is less than the flow rate,the distribution of liquid and gas is similar to the situation without magnetic field. At the three different ways,the influence is most intense which magnetic and electric field perpendicular to each other,the influence is weakest when the magnetic and electric fields parallel to each other.The study of anode material removal in electrolytic machining use two dimensional physical model under two kinds of magnetic field placed way,considering flow field is consist of gas and liquid.finite element model and mathematical model was established, using COMSOL Multiphysics,the effect of magnetic field on the amount of material removal is studied in this paper.The study shows,the amount of material removed is more in vertical magnetic field, and the amount is almost the same as parallel magnetic field compared with no magnetic field add.in vertical magnetic field,the amount of material removal is increase when the strength of the magnetic field is Increase.In order to reveal the effect of magnetic field on electrolytic machining further,this article researched the trajectory of single charged particles, and magnetic field impact on single bubble from the microscopic point of view,the results show, with the magnetic field, trajectories of electrons is changed,the maximum length of the electron motion is two times longer than the gap spacing,magnetic filed enhanced the pressure of the bubble environment,and promote the contraction and expansion deformation of the bubble,accelerated the collapse of bubble.