A non-iterative method to evaluate surface tension and contact angle simultaneously by a sessile drop in gravity using universal figures

A non-iterative method is proposed to evaluate surface tension and contact angle simultaneously from a sessile drop observation in gravity using two universal figures. theory of the used assuming an axisymmetric profile drop. Numerical calculation carried out prepare The first one figures relation between normalized curvature at top geometry ratio height radius point on surface. second point. position tangential are obtained observation. Using figure, can be determined determined. Since heights measurement, normalizing factor obtained. Because function liquid, we liquid By taking average several points, improve accuracy evaluated. Also, figure edge without measurement angle. present demonstrated pure water droplet water-repellent It shows successful evaluation angle, observation, any iterative calculation.