ABSTRACT
Dynamic wetting phenomena (i.e., the description of moving fluid-fluid-solid in terfaces or contact lines) are of immense scientific and technological interest (Elyousfi, et al. [1]; Ishimi, et al. [2]; Teletzke, et al. [3, 4]; Dussan, [5]; de Gennes, [6]; Cazabat, [7]; Blake, [8]; Kistler, [9]). Prediction of the dynamic con-
tact angle from a known value of the static contact angle and the capillary number is complicated by the stress singularity that occurs at the contact line if the no-slip condition is enforced at the fluid-solid interfaces (Huh and Scriven, [10]). This singularity can be avoided by including slip along a small distance from the con tact line (Huh and Scriven, [10]; Huh and Mason, [11]; Dussan, [5]; Lowndes, [12]; Cox, [13]; Hocking, [14]). The value of the slip length, Zy, has an influence on the calculated dynamic contact angle. Although this slip model yields theoreti cal solutions, the value of the slip length parameter cannot be measured nor de termined from first principles. Here we introduce a computational method to de termine the shape of the dynamic contact region without assuming a slip model. In fact a goal of future work is to express the slip length parameter in terms of the disjoining pressure isotherm.
