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Numerical Investigation Of Boundary Conditions For Moving Contact Line Problems, Sandesh Somalinga, Arijit Bose

Chemical Engineering Faculty Publications

When boundary conditions arising from the usual hydrodynamic assumptions are applied, analyses of dynamic wetting processes lead to a well-known nonintegrable stress singularity at the dynamic contact line, necessitating new ways to model this problem. In this paper, numerical simulations for a set of representative problems are used to explore the possibility of providing material boundary conditions for predictive models of inertialess moving contact line processes. The calculations reveal that up to Capillary number Ca=0.15, the velocity along an arc of radius 10L_i (L_i is an inner, microscopic length scale! from the dynamic contact line is independent of …