Numerical modeling of liquid-gas two-phase flow and heat transfer in reconstructed porous media at pore scale

摘要

The complicated multiphase flow in porous media is one important issue in the field of energy utilization. This work performed the pore-scale lattice Boltzmann modeling and simulation of liquid gas two-phase fluid transport phenomena within porous domain. The three-dimensional porous structure was numerically reconstructed with high-resolution CT scan images. The flow and thermal parameters in porous spaces were obtained under the conditions of different contact angles. The liquid water in the porous domain with hydrophilic solid surface reaches the equilibrium state more quickly compared to that in hydrophobic one. The numerical approach established in this paper can provide detailed information of the multiphase fluid transport characteristics in complex porous media. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.