Articles techniques et présentations

Considering a liquid drop in relative movement with respect to the air flow at uniform velocity, the liquid will be driven to the surface by the viscous friction. Internal vortices will appear inside the drop. This problem has already been studied in fluid mechanics and is well known as a classic problem. The idea of the present work is to resume the same analysis in a porous medium within a spherical zone of porous medium saturated with liquid surrounded by a gas flow. We have simulated the problem using COMSOL Multiphysics® where we have validated the model by experimental data obtained from MRI method. The effects of capillary pressure and application of different rules have been studied.