Intrinsic versus superrough anomalous scaling in spontaneous imbibition

Pradas, M. and Hernández-Machado, A. (2006). Intrinsic versus superrough anomalous scaling in spontaneous imbibition. Physical Review E, 74 041608.

DOI: https://doi.org/10.1103/PhysRevE.74.041608

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 μ_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, α=1.50±0.02, and α_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, α=1.25±0.02, and α_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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About

• Item ORO ID
• 41203
• Item Type
• Journal Item
• ISSN
• 1550-2376
• Project Funding Details

• Funded Project Name	Project ID	Funding Body
  Not Set	Project BFM2003-07749-C05	Not Set

• Academic Unit or School
• Faculty of Science, Technology, Engineering and Mathematics (STEM) > Mathematics and Statistics
  Faculty of Science, Technology, Engineering and Mathematics (STEM)
• Copyright Holders
• © 2006 The American Physical Society
• Depositing User
• Marc Pradas