The Possibility of Changing the Wettability of Material Surface by Adjusting Gravity

Equilibrium of forces near the three-phase contact line of sessile drop. (a) Diagram of a sessile drop. (b) Equilibrium of forces near the three-phase contact line. and : solid-liquid and the solid-vapor interfacial tension forces; and : force caused by the hydrostatic pressure and its horizontal component; , , and : liquid-vapor interfacial tension forces; : horizontal component of ; : the apparent contact angle.