Lattice Boltzmann simulation of droplet dynamics on groove surfaces
For the wetting behaviors and anisotropic wetting behaviors of droplets on micro-structured sur-faces,the effects of the groove surface size,the droplet size and the gravity field on the dynamic behaviors of droplets were simulated and studied by the lattice Boltzmann method.The results show that the vertical contact angle is greater than the parallel contact angle and inversely proportional to the rib width.It increases first and then decreases with the increase of the groove width.However,the parallel contact angle is independent of the groove surface size.The droplet radius,the droplet contact angle and the wall solid fraction are correlated with each other.The wall solid fraction,the droplet radius and the gravity coefficient are positively correlated with the droplet deformation ratio.The spreading motion of the droplet along the vertical groove direction has a large energy barrier and exhibits an anisotropic wetting behavior.The increase of the droplet radius and the gravity field can weaken the anisotropic wetting behaviors of the droplet.The change of the droplet state can be achieved by changing the wall solid fraction at the wall.
万方数据
维普
