Three-dimensional simulations of miscible porous media flows.

Amir Riaz and Eckart Meiburg

When a less viscous fluid displaces a more viscous one in a porous medium, the interface is unstable and gives rise to viscous fingers. These interact with each other nonlinearly. The figure shows an iso-concentration surface outlining the geometry of the front.

REFERENCES
Miscible Porous Media Displacements in the Quarter Five-Spot Configuration. Part 1: The Homogeneous Case. Fluid Mech 371, 233 (1998).

Miscible Porous Media Displacements in the Quarter Five-Spot Configuration. Part 2: Effect of Heterogeneities, with C.-Y. Chen, J. Fluid Mech 371, 269 (1998).