Metastable contact angles and self-propelled drop movement on chemically heterogeneous surfaces by a mean-field lattice Boltzmann model
School of Engineering, Laurentian University, Sudbury, Ontario, P3E 2C6, Canada
2 National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing, 210094, China
3 Nanoscale Technology and Engineering Laboratory, Department of Mechanical Engineering, Schulich School of Engineering, University of Calgary, Calgary, Alberta, T2N 2N4, Canada
Contact angle behaviors on heterogeneous surfaces were studied by the mean-field free-energy lattice Boltzmann method. Our results suggest that the relation for contact angles on heterogeneous surfaces proposed by Israelachvili and Gee [Langmuir, 5, 288 (1989)] is in general not valid for the case examined. Droplet self-propelled movement on chemically patterned surfaces was also modeled by means of a local surface tension gradient.
© EDP Sciences, Springer-Verlag, 2009