Almost all experiments on the nonequilibrium capillary effect, which are found in the literature, have involved water-air systems where the movement of the air phase has not been of interest. In this work, we report on a series of experiments involving the displacement of two immiscible phases: water and a DNAPL, where the movement of both phases are important. The experiments have been carried out within a geocentrifuge. In these experiments, capillary pressure versus water saturation Pc-Sw relationships have been obtained under various transient conditions. The results are compared to each other and to the equilibrium Pc-Sw curve obtained under normal laboratory conditions. The major aim of this work is to investigate the presence and significance of dynamic effects in two-phase flow experiments carried out within a geocentrifuge.
For more information, please send an e-mail to geocentrifuge@geodelft.nl.
