Unstable miscible liquid—liquid displacement in porous media: A new model for predicting displacement performance in homogeneous beds

Monitoring liquid displacement of model and industrial fluids in pipes by in-line ultrasonic rheometry

“…In the converse situation, for acceleration directed from the less dense to the denser liquid, the unstable accelerating interface surface develops in such way that a single or several long fingers of the less dense liquid penetrate into the denser and more viscous one. Unstable miscible liquid-liquid displacement in cylindrical tubes, vertical pipes and porous media, for example, has been studied in detail (Balasubramaniam et al, 2005;Gabard and Hulin, 2003;Scoffoni et al, 2001;Nguyen and Bagster, 1979).…”