Pradas M, Hernández-Machado A. Intrinsic versus superrough anomalous scaling in spontaneous imbibition.
PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2006;
74:041608. [PMID:
17155071 DOI:
10.1103/physreve.74.041608]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 07/13/2006] [Indexed: 05/12/2023]
Abstract
We study spontaneous imbibition using a phase field model in a two-dimensional system with a dichotomic quenched noise. By imposing a constant pressure mu(a)<0 at the origin, we study the case when the interface advances at low velocities, obtaining the scaling exponents z=3.0+/-0.1, alpha=1.50+/-0.02, and alpha(loc)=0.95+/-0.03 within the intrinsic anomalous scaling scenario. These results are in quite good agreement with experimental data recently published. Likewise, when we increase the interface velocity, the resulting scaling exponents are z=4.0+/-0.1, alpha=1.25+/-0.02, and alpha(loc)=0.95+/-0.03. Moreover, we observe that the local properties of the interface change from a superrough to an intrinsic anomalous description when the contrast between the two values of the dichotomic noise is increased. From a linearized interface equation we can compute analytically the global scaling exponents which are comparable to the numerical results, introducing some properties of the quenched noise.
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