Numerical modelization of contact angle hysteresis of falling droplet under enhanced lubrication approximation

Abstract Moving contact lines are involved in several engineering applications: in-flight icing phenomenon, the eventual transition from droplet to rivulet or continuous film regime is crucial for prediction of ice accretion over aircraft surface; absorption process through structured packing also characterized by a thin flowing corrugated sheets. Disjoining pressure together with assumption precursor largely used numerical simulations films and moving droplets order model dynamics surface wettability properties, terms imposed static angle. The disjoining was validated case falling well known Voinov-Hoffman-Tanner law. On other side, capability angle hysteresis, which parameter predicting behavior, has not been discussed yet. Here, both under lubrication approximation conducted predict line dynamics. After verification full curvature implementation 1D film, effective hysteresis estimated different flow conditions detected.