2012/07/09 by David N. Sibley, Nikos Savva, Serafim Kalliadasis
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Classical mechanics #Fluid Dynamics and Thin Films #Interface model #Mechanics #Nanomaterials and Printing Technologies #Physics #Planar #Slip (aerodynamics) #Surface Modification and Superhydrophobicity #Thermodynamics #math-ph #math.MP #physics.flu-dyn
paper · pdf · doi:10.1063/1.4742895
published as Phys. Fluids 24, 082105 (2012) · 45 pages, 18 figures
arxiv created 2012/07/09 · openalex publication_date 2012/08/01 · arxiv updated 2012/08/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the spreading of a thin two-dimensional droplet on a planar substrate as a prototype system to compare the contemporary model for contact line motion based on interface formation of Shikhmurzaev [Int. J. Multiphase Flow 19, 589–610 (1993)]10.1016/0301-9322(93)90090-H, to the more commonly used continuum fluid dynamical equations augmented with the Navier-slip condition. Considering quasistatic droplet evolution and using the method of matched asymptotics, we find that the evolution of the droplet radius using the interface formation model reduces to an equivalent expression for a slip model, where the prescribed microscopic dynamic contact angle has a velocity dependent correction to its static value. This result is found for both the original interface formation model formulation and for a more recent version, where mass transfer from bulk to surface layers is accounted for through the boundary conditions. Various features of the model, such as the pressure behaviour and rolling motion at the contact line, and their relevance, are also considered in the prototype system we adopt.