I was wondering if there are any articles or equations calculating the amount of residual fluid kept on the surface of a submerged object. In other words, is there an expression for wetness knowing properties of the fluid (viscosity, friction coeff), and object? I do not necessarily need to know the amount of fluid left, but perhaps a fluid concentration on the surface as a function of all variables necessary. I guess it would help to know if wetness is analogous to porosity. Any help or names that will keep me in track would be greatly appreciated.