IBM-LBM modelling of two-phase flow in porous media

[摘要] The phenomena of Two-Phase Flow with large density ratio (about 1000:1) in porous media occurs in many environmental and industrial processes. This thesis aims to develop a numerical tool to simulate the Two-Phase Flow along curved solid boundaries with Lattice Boltzmann (LB) method. In addition, a modified Ghost Fluid Immersed Boundary (GFIB) model is proposed to capture the local interaction behaviour among fluids and curved boundaries.The code is first checked with the droplet test, capillary rise test, capillary bridge test and contact line dynamic test and all cases resulted in less than 5.0% error in comparison with the analytical solutions. Then it is further verified with capillary rise in porous media and the numerical pressure satisfies the theoretical one with 12.7% error. In addition, the parameter studies are conducted to gauge the influence of four main parameters in the model, including the interface thickness, the mobility, the domain size and the grid resolution with good results. As a result, the new code with the LB-GFIB model can provide an alternative way to study the complex process of Two-Phase Flow in the porous media.

[发布机构] University:University of Birmingham;Department:School of Engineering, Department of Civil Engineering

[关键词] T Technology;TA Engineering (General). Civil engineering (General)