Contact line dynamics in binary lattice Boltzmann simulations

Details Contact line dynamics in binary lattice Boltzmann simulations Contact line dynamics in binary lattice Boltzmann simulations

2008-12-06

arxiv.org/abs/0812.1282v1

Physical Review E 78, 056709 (2008)

Physics

Computational Physics

10 pages, 5 figures

Scientific paper

10.1103/PhysRevE.78.056709

We show that, when a single relaxation time lattice Boltzmann algorithm is used to solve the hydrodynamic equations of a binary fluid for which the two components have different viscosities, strong spurious velocities in the steady state lead to incorrect results for the equilibrium contact angle. We identify the origins of these spurious currents, and demonstrate how the results can be greatly improved by using a lattice Boltzmann method based on a multiple-relaxation-time algorithm. By considering capillary filling we describe the dependence of the advancing contact angle on the interface velocity.

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