Comment on "Pipe Network Model for Scaling of Dynamic Interfaces in Porous Media"

M. Dubé, M. Rost, K. Elder, M. Alava, S. Majaniemi, T. Ala-Nissila
2001 Physical Review Letters  
We argue that a proposed exponent identity [Phys. Rev. Lett 85, 1238 (2000)] for interface roughening in spontaneous imbibition is wrong. It rests on the assumption that the fluctuations are controlled by a single time scale, but liquid conservation imposes two distinct time scales.
doi:10.1103/physrevlett.86.6046 pmid:11415425 fatcat:lcwh7dlhzbgxxcpb2cra5wvgee