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Gray free-energy multiphase lattice Boltzmann model with effective transport and wetting properties

Zalzale, M, Ramaioli, M, Scrivener, KL and McDonald, PJ (2016) Gray free-energy multiphase lattice Boltzmann model with effective transport and wetting properties Physical Review E: Statistical, Nonlinear, and Soft Matter Physics, 94 (5).

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Abstract

The paper shows that it is possible to combine the free energy lattice Boltzmann approach to multi-phase modelling of fluids involving both liquid and vapour with the partial bounce back lattice Boltzmann approach to modelling effective media. Effective media models are designed to mimic the properties of porous materials with porosity much finer than the scale of the simulation lattice. In the partial bounce back approach, an effective media parameter or bounce back fraction controls fluid transport. In the combined model, a wetting potential is additionally introduced that controls the wetting properties of the fluid with respect to interfaces between free space (white nodes), effective media (grey nodes) and solids (black nodes). The use of the wetting potential combined with the bounce back parameter gives the model the ability to simulate transport and sorption of a wide range of fluid / material systems. Results for phase separation, permeability, contact angle and wicking in grey media are shown. Sorption is explored in small sections of model multi-scale porous systems to demonstrate two-step desorption, sorption hysteresis and the ink-bottle effect.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Zalzale, MUNSPECIFIEDUNSPECIFIED
Ramaioli, MUNSPECIFIEDUNSPECIFIED
Scrivener, KLUNSPECIFIEDUNSPECIFIED
McDonald, PJUNSPECIFIEDUNSPECIFIED
Date : 1 November 2016
Identification Number : https://doi.org/10.1103/PhysRevE.94.053301
Copyright Disclaimer : ©2016 American Physical Society
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 25 Oct 2016 10:10
Last Modified : 02 Nov 2016 08:23
URI: http://epubs.surrey.ac.uk/id/eprint/812585

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