Lattice Boltzmann method for dynamic wetting problems.

Wetting is an important phenomenon in many engineering applications. In this study, a new algorithm is presented to simulate 2D dynamic wetting phenomena using the single phase lattice Boltzmann method (LBM). Basis of our method is an additional force at triple points where fluid, gas and wall intersect. This supplementary force, which is treated as a capillary force, is able to simulate the equilibrium and dynamic wetting behavior of liquids. Based on this method, droplet spreading or recoiling on a solid surface and the capillary rise with various wetting properties can be simulated successfully. The results of the simulation are compared with analytical solutions and experiments. Good agreement is achieved for dynamic as well as equilibrium situations.