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The investigation of two- or three-phase boundaries is an essential part in the study of different surface phenomena like surface tension, contact angles, wetting hysteresis, swelling, and flotation. At present, the most accurate methods to investigate these parameters are based on the digital image processing of interfacial profiles. In this paper we describe several methods employing the digital...
The contact angles of liquid drops on inclined plane surfaces have been investigated at critical conditions of sliding. Drops of two liquids were tested on eight surfaces covering a wide range of advancing and receding contact angles. Contact angles and contact line dimensions were observed for various drop sizes and surface inclination angles. The contact-angle variation along the circumference of...
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