Journal
COMPUTERS & FLUIDS
Volume 178, Issue -, Pages 132-140Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compfluid.2018.08.024
Keywords
Capillary-driven infiltration; Spontaneous imbibition; Free-surface lattice-Boltzmann (FSLB)
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We present an analytical approach, as well as computer simulations based on the free surface lattice-Boltzmann (FSLB) method, in order to model capillary-driven infiltration of liquids into porous structures. The analytical method is an extension of the Lucas-Washburn (LW) equation and applies to axisymmetric geometries with a circular cross-section. The treatment of irregular capillaries is achieved by a discretization procedure in which the original geometry is divided into small cylinders. In order to validate the derived analytical equation, we perform FSLB simulations in test geometries which show a good agreement. (C) 2018 Published by Elsevier Ltd.
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