MORPHOLOGY AND DYNAMICS OF INTERFACES IN RANDOM 2-DIMENSIONAL MEDIA

Citation
Cs. Nolle et al., MORPHOLOGY AND DYNAMICS OF INTERFACES IN RANDOM 2-DIMENSIONAL MEDIA, Physical review letters, 71(13), 1993, pp. 2074-2077
Citations number
28
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
71
Issue
13
Year of publication
1993
Pages
2074 - 2077
Database
ISI
SICI code
0031-9007(1993)71:13<2074:MADOII>2.0.ZU;2-1
Abstract
We study the morphology and dynamics of an interface driven through a disordered two-dimensional medium by an applied force. At large length scales the interface self-affine with roughness exponent alpha = 1/2. The structure at small scales may be self-similar or self-affine, dep ending on the degree of disorder. Simulations of wetting invasion prod uce self-affine interfaces with alpha = 0.8 and a power law distributi on of local interface velocities. Numerical results are in excellent a greement with experiment. A technique that distinguishes between true self-affine scaling and a crossover is presented, and applied to the i nvasion model and a model for magnetic domain growth.