Natural convection of compressible and incompressible gases in undeformable porous media under cold climate conditions

摘要: Abstract A numerical model for convective heat and mass transport of compressible or incompressible gas flows with soil-water phase change is presented. In general, the gaseous considered as accounts adiabatic processes compression heating expansion cooling. The inherently may nevertheless be by adopting Oberbeck–Boussinesq approximations. method used to solve equations that describe natural convection based on a Galerkin finite element formulation adaptive mesh refinement dynamic time step control. As most existing studies have focused behavior fluids, substantiation examines influence fluid compressibility two-widely benchmarks steady-state transport. relative importance effect pressure-compressibility cooling shown increase thermal gradient approaches magnitude gradient. From these results, it concluded pore-air cannot neglected in medium large-sized enclosures at small temperature differentials. After demonstrating its ability fairly complex transient problems, further our understanding toe drain LA2-BSU dam province Quebec, Canada.