Effect of Contact Angle Hysteresis on Evaporation Dynamics of a Sessile Drop on a Heated Surface

Contact angle hysteresis (CAH) is a significant factor affecting the drop motion on solid substrates. A model of CAH introduced to explore influence dynamics sessile uniformly heated surface, and two-dimensional evolution equation thickness established using lubrication approximation Navier slip boundary conditions. numerical simulation performed examine dynamic behaviors an evaporating drop, profile, contact angle, line, moving speed are investigated. Simulated results indicate that process involves spreading, pinning, depinning line. In spreading stage, when increases, period shortened, radius reduced; in contrast, pinning raised, mass apparently reduced with increasing angle. declines flatter pattern evolved, thereby improving heat transfer performance, promoting evaporation, shortening time. The presence can up drying large leads faster evaporation. Regulating effective way manipulate line for drop.