Abstract
The horizontal displacement of mercury drops along flat glass surfaces, and how it is affected by roughness, is studied experimentally. The measurements include: static and dynamic drop shapes, advancing and receding contact angles, surface structure characterizations, and the time evolution of the drop's position as a function of mass and surface roughness. The motion is found to be described by a phenomenological model assuming the action of a linear velocity-dependent retarding force with a strength proportional to the liquid-solid contact area. Roughening is found to have the effect of increasing the drops mobility. The contact angle systematics suggest that the latter is due to the formation of a composite liquid-solid interface which reduces the effective contact area. The length of a drop's trajectory is found to be inversely proportional to its effective contact area. A model is proposed which gives a reasonable quantitative understanding of the relationship between contact angles and mobility.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
