Pressure-dependent scaling scenarios in experiments of spontaneous imbibition.
Phys Rev E Stat Nonlin Soft Matter Phys
; 76(5 Pt 2): 056312, 2007 Nov.
Article
em En
| MEDLINE
| ID: mdl-18233761
ABSTRACT
The scaling properties of the rough liquid-air interface formed in the spontaneous imbibition of a viscous liquid by a model porous medium are found to be very sensitive to the magnitude of the pressure difference applied at the liquid inlet. Interface fluctuations change from obeying intrinsic anomalous scaling at large negative pressure differences, to being super-rough with the same dynamic exponent z approximately =3 at less negative pressure differences, to finally obeying ordinary Family-Vicsek scaling with z approximately =2 at large positive pressure differences. This rich scenario reflects the relative importance on different length scales of capillary and permeability disorder, and the role of surface tension and viscous pressure in damping interface fluctuations.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article