EFFECT OF CONTACT ANGLE HYSTERESIS ON DROPLET BEHAVIORS： TWO-PHASE LATTICE BOLTZMANN SIMULATION

An approach of dealing with contact angle hysteresis in lattice Boltzmann method is introduced in detail. The approach is also used to investigate droplet behaviors on surfaces of chemical inhomogeneities or roughness （non-ideal surfaces）. Droplet slipping on surfaces under gravity or in shear flows, and droplet impacting on sur- faces are numerically simulated. It is found that the present approach is suitable to model droplet motions on non- ideal surfaces and the contact angle hysteresis has an obvious effect on the motion of droplets.