Study on the Microscopic Dynamic Contact Angle by Means of Molecular Dynamics Simulation

摘要

By means of molecular dynamics simulation, the advancing and receding microscopic contact angles were analyzed for the two mono-atomic fluids confined between two non-polar solid walls. We show that the microscopic contact angles as a function of the capillary number have the same form as Blake's molecular-kinetic model[T. Blake and J. Haynes, J. Colloid Interface Sci. 30, 421-423 (1969)], which was also found by Omori and Kajisima [Phys. Fluids 29, 112107 (2017)] in their numerical analysis solving the Navier-Stokes equation and the Cahn-Hilliard equation with the generalized Navier boundary condition.