Scaling of propagating capillary fronts
Department of Physics of Complex Systems, The Weizmann Institute of Science, Rehovot 76100, Israel
2 Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
3 Minerva Center and Physics Department, Bar Ilan University - Ramat Gan, Israel
Accepted: 30 April 1997
We report an experimental and theoretical study of wetting front propagation in anisotropic paper. The height-height correlation function is measured in the presence of large scale biasing and is found to scale with an exponent . Theoretical analysis of this two-dimensional invasion predicts logarithmic scaling for isotropic paper. The observed nonzero roughness is due to correlated randomness and anisotropy in the paper.
PACS: 47.55.Mh – Flows through porous media / 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion / 68.45.Gd – Wetting
© EDP Sciences, 1997