An efficient computational model for macroscale simulations of moving contact lines

Authors:
Y. Sui;Peter D. M. Spelt
Affiliations:
Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK and School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, UK;Département Mécanique, Université de Lyon 1, France and Laboratoire de Mécanique des Fluides & d'Acoustique (LMFA), CNRS, Ecully, France
Venue:
Journal of Computational Physics
Year:
2013

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Abstract

We propose an efficient level-set approach for numerical simulation of moving contact lines. The main purpose is to formulate and test a model wherein the macroscale flow is resolved while the effects of the microscopic region near a contact line are represented using asymptotic theories. The model covers viscous as well as inertial regimes. Test simulations include axisymmetric displacement flow in a tube and droplet spreading on a flat surface. The results show that the present approach leads to excellent convergence properties even with very coarse grids; furthermore, the results agree well with asymptotic analysis, with those obtained with a method for direct numerical simulations (wherein an adaptive grid is used) and also with experiments.