## Phys

- M. Ben Amar
- Rev. E, 51:3819, (1995). E. Corvera Poiré and M…
- 1999

– We analyze the effect of frequency on the width of a single finger displacing a viscoelastic fluid. We derive a generalized Darcy’s law in the frequency domain for a linear viscoelastic fluid flowing in a Hele Shaw cell. This leads to an analytic expression for the dynamic permeability that has maxima which are several orders of magnitude larger than the… (More)