References for the Free Surface Features
1. J. Gerbeau and T. Lelièvre, “Generalized Navier Boundary Condition and Geometric Conservation Law for Surface Tension,” Computer Methods In Applied Mechanics and Engineering, vol. 198, pp. 644–656, 2009.
2. W. Ren and E. Weinan, “Boundary Conditions for the Moving Contact Line Problem,” Physics of Fluids, vol. 19, p. 022101, 2007.
3. W. Ren and D. Hu, “Continuum Models for the Contact Line Problem,” Physics of Fluids, vol. 22, p. 102103, 2010.