Miscible Viscous Fingering of Pushed Versus Pulled Interface

S. Pramanik[1], M. Mishra[1]
[1]Indian Institute of Technology Ropar, Rupnagar, Punjab, India
Published in 2013

Viscous fingering (VF) instability has been extensively studied over past several decades in the context of various industrial, environmental and chemical processes. We try to model miscible VF at pushed or pulled interfaces using COMSOL Multiphysics®. We study the effect of the positive and negative log-mobility ratio on the fingering instability. Numerical simulation has been performed in 2D Eulerian frame for different flow parameters such as log-mobility ratio (R), width of the Hele-Shaw cell or porous media (Ly) etc. Grid dependency of the COMSOL simulation for VF instability has been exposed and we propose the optimal grid required for the appropriate simulation, which resembles various numerical (Fourier-spectral, finite difference methods) results available in literature.