The study of thermocapillary deformation and rupture in horizontal water layer by confocal laser scanning microscopy

About the authors:

Aleksandr A. Fedorets, Dr. Sci. (Tech.), Head of the Laboratory of Micro-Hydrodynamic Technologies, University of Tyumen; fedorets_alex@mail.ru

Vyacheslav V. Cheverda,

Abstract:

The effect of thermocapillary deformation and rupture of a thin horizontal water layer on the sapphire substrate with lineal resistance heater from indic oxide (in the form of deposited path with thickness of 0.5 μm, width of 0.5 mm and length of 40 mm) is experimentally investigated. For high-precision measurements of the layer thickness, the laser scanning confocal microscope is applied. It is found that the depth of the thermocapillary deformation increases directly proportional to the heat capacity. It is suggested that the rapture occurs when in a thinning liquid layer under thermocapillary deepening space density of heat flow reaches a threshold value determined by a complex of liquid and substrate properties.

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