Thoughts Old and New on Moving Contact Lines

摘要

The motion of a contact line, defined as the line where the interface between two fluids meets a solid surface, over the same surface introduces a difficulty) an unacceptable singularity in deformation rate and stress fields at the contact line) into the conventional assumptions of continuum (Newtonian fluid) mechanics. This arises because traditionally it is assumed that, even at a perfectly smooth plane solid surface, there is no velocity discontinuity between fluid and solid; this is the celebrated no-slip assumption.