INSTABILITY IN DISPLACEMENT OF VISCOUS FLUIDS FROM POROUS MEDIUM

摘要

The goal of the present study is to investigate numerically the instability of the displacement of viscous fluid by a less viscous one in a two-dimensional three-dimensional porous specimens, and to determine characteristic size of entrapment zones. Experiments on miscible displacement of fluids in Hele-Shaw cells were conducted under microgravity conditions and reported at the previous Congress. The present paper contains the results of extensive direct numerical simulations, which allowed to investigate the sensitivity of the displacement process to variation of values of the main governing parameters. The effect of the three-dimensional phenomena on development of instability was investigated.