We studied numerically the three-dimensional droplets spreading on chemically patterned surfaces with periodic squares separated by channels. Our model consists of the Navier-Stokes-Cahn-Hilliard equations with the generalized Navier boundary conditions. Stick-slip behavior and contact angle hysteresis are observed. Moreover, we also study the relationship between the effective advancing/receding angle and the two intrinsic angles of the surface patterns. By increasing the volume of droplet gradually, we find that the contact line tends gradually to an equiangular octagon.
南方科技大学数学系微信公众号
© 2015 All Rights Reserved. 粤ICP备14051456号
Address: No 1088,xueyuan Rd., Xili, Nanshan District,Shenzhen,Guangdong,China 518055 Tel: +86-755-8801 0000