Physics

A method for monitoring small surface movements of a sessile drop during evaporation

V. L. Ushakov, G. P. Pyzin, V. P. Beskachko

South Ural State University

Abstract: Interference methods allow researchers to obtain the information about normal displacements of a phase surface with high resolution and in real time. This opportunity was realized to observe time changes of the height of evaporating drop accurate to a fraction of the wavelength of visible light. We consider the possibilities of studying processes on a drop surface, that accompany the evaporation and are small-scale in terms of space and time.

Keywords: interfacial phenomena; evaporation; drop shape; sessile drop method; interferometric methods.

UDC: 532.6

Received: 01.10.2013