| Abstract: | The existence of capillary-gravitational equilibrium is detected in the problem of the penetration of a nonwetting fluid into
a porous medium from the top. Using a numerical simulation method, three qualitatively feasible regimes of operation of the
system are distinguished: total penetration of the soil; penetration to a finite depth, i.e., starting from a certain moment
of time the gravitational head is weaker than the capillary resistance of the medium; no penetration of the soil. The existence
of these three regimes makes it possible to distinguish critical parameters of the process expressed in terms of the Bond
number.
Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 2, pp. 95–103, March–April, 1998. |
