Lattice Boltzmann simulations of contact line motion in a liquid-gas system

Details Lattice Boltzmann simulations of contact line motion in a liquid-gas system Lattice Boltzmann simulations of contact line motion in a liquid-gas system

2002-03-05

arxiv.org/abs/cond-mat/0203093v1

Physics

Condensed Matter

Soft Condensed Matter

13 pages, 5 figures, to appear in Phil. Trans. Roy. Soc. A (Proceedings of the Xth International Conference on Discrete Simula

Scientific paper

10.1098/rsta.2001.0943

We use a lattice Boltzmann algorithm for liquid-gas coexistence to investigate the steady state interface profile of a droplet held between two shearing walls. The algorithm solves the hydrodynamic equations of motion for the system. Partial wetting at the walls is implemented to agree with Cahn theory. This allows us to investigate the processes which lead to the motion of the three-phase contact line. We confirm that the profiles are a function of the capillary number and a finite size analysis shows the emergence of a dynamic contact angle, which can be defined in a region where the interfacial curvature tends to zero.

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