A stability analysis of immiscible viscous displacement in a homogeneous porous medium
T. J. T. Spanos · Canadian Journal of Physics · 1980
The stability of viscous displacement in a porous medium is considered in terms of the stability of fluid wave propagation in the medium. The concept of a critical wavelength is used to describe the criteria for the onset of fingering and the transition from the range for which Darcy's equation applies to the conditions under which the Brinkman equation must be used.