Experimental Study of Dynamic Permeability in Porous Media

We report experimental measurements of ac permeability made on a variety of fused glass beads and crushed glass in a frequency range of 0.1 Hz to 1 kHz. We observe a rollover in $\kappa \left(\omega \right)$ from a viscous flow regime to an inertial one, and determine the values of the transport coefficients in both the high-frequency limit and the low-frequency limit. A good agreement is found with the scaling theory $\frac{\kappa }{{\kappa }_0}=f\left(\frac{\omega }{{\omega }_c}\right)$ with only two independent parameters.