Effect Of The Absolute Permeability Between Solid Volume Fraction And The Solid Particle Size In Porous Medium Fluid

Porous media is widely exist in nature,for example,coal,sandstone and other unconventional energy reservoirs are typical of porous media.Permeability of porous media is an important parameter in relation to the fluid transportation.The study of permeability of porous media not only has a practical value in the technical field of engineering,such as oil and gas exploration,groundwater utilization,but also has a scientific significant in understanding the transportation regulation of porous media.In this thesis,numerical models of porous media are implemented by random filling of spherical solid particles in a three-dimensional simple-cubic grid.The flow of the fluid in these models was simulated by using the Lattice Boltzmann method(LBM),and the permeability values of the porous media model under different solid volume fractions and particle radius were calculated.Considering in some engineering and technical fields,the solid part of the flow field in the flow of the fluid in the porous medium is often not completely impermeable,but has a certain permeability.In order to study the relationship between the permeability of porous media and the structure of porous media,based on partial rebound Lattice Boltzmann method in this paper,we conducted the flowing simulation to porous media,in this way,we calculate the different solid volume fraction.when the permeability coefficient in solid part adopt different numbers,the result of permeability are different.The results of the permeability analysis of the porous and partially permeable porous media model are compared by statistical analysis to the bulk permeability when the solid is partially permeated.According to the porous media numerical model that was established in this paper,we draw conclusions from these data:(1)When the solid is completely impermeable,the permeability ofthe porous media model decreases with the increase of the solid volume fraction when the radius of the solid particles is constant.When the solid volume fraction is constant,the model permeability increases with the numerical simulation results of porous media model permeability were obtained by comparing the effective permeability coefficient of the solid medium.The permeability of the porous media model with the solid volume fraction and the particle radius changed with different effective permeability coefficient.(2)By contrasting the porous medium's numerical simulation,when the permeability coefficient is different result,we can learn that the relative influence of the permeability of the solid part on the permeability of the porous medium is more obvious with the increase of the solid volume fraction under the same solid particle radius.The same solid volume fraction,The relative effect of the penetration of the solid part on the bulk permeability decreases with the increase of the radius of the solid particles.The larger the effective permeation coefficient is the same as the solid volume fraction and the particle radius,The relative impact of the rate is more pronounced.The results of this study not only help to understand the flow of fluid in porous media,but also have practical reference value for engineering and other fields of oil and gas exploration.