Study On The Distribution And Influence Of Solid-liquid Two Phase Flow Under Different Conditions In Porous Media

Examples of solid-liquid two-phase flow in porous media are widely used in the fields of industry,agriculture,mining and petroleum industry.With the concern of environmental problems in recent years,increasingly researches have been done in this field,such as the leakage of tailings,the migration of landfill leachate and groundwater recharge.lt has important application value and significance.This paper as the background of the problem of the ore particles deposition in the tailings reservoir to study the distribution law of solid-liquid two-phase flow in porous media under different conditions purpose to obtain the deposition and distribution of infiltration particles in porous media.Main contents are as follows:(1)Study on the basic theory of particle movement,porous medium pore model,the main migration and deposition model of particles in porous media and the current experimental study on the migration deposition model.(2)Design an experimental device and program for the distribution of solid-liquid two-phase flow in porous media under different conditions.Study on the relationship of porous media wall effect and the average diameter of the pore channels,and further study the effect of medium diameter and medium particle median diameter ratio Dt/Dp on the average diameter of the pore channel,then get the size of wall surface effect in this experiment.(3)Conduct experimental research on the distribution of infiltration particles in porous media.By setting the difference of particle size,particle size and particle size of porous media to research:Particles in the instantaneous deposition quality and total deposition quality of porous media in different time;analysis of the final quality of deposition at the interface of particles and the internal porous medium;analysis of porous media section particle deposition intensity and final deposition quality;Finally,the different phenomena of particle deposition in porous media are classified and summarized and the sedimentary distribution law are obtain.(4)Orthogonal experiment was designed to study the influence of particle size,particle size,head height and two-phase flow concentration on the permeability of porous media.Based on the convection diffusion equation,the evolution equation of porous media porosity with infiltration time is derived by using the transport equation of the particle in the saturated and homogeneous porous media.