Laser-induced thermocapillary convection in thin liquid layers: effect of thermal conductivity of substrates

Laser-induced thermocapillary convection in thin liquid layers: effect of thermal conductivity of... The effect of the thermal conductivity of solid substrates on the thermocapillary convection induced by the thermal action of a laser beam in a thin liquid layer is studied experimentally. A diameter of photothermocapillary signal presenting a circular interference pattern formed on a screen by a probe laser beam reflected from the thermocapillary dimple is used for quantitative analysis. It is shown that diameter of the photothermocapillary signal changes with the thermal conductivity of substrates as k −n . This suggests that the thermal conductivity of substrate strongly affects the curvature of thermocapillary dimple. An influence of the power of the heating laser beam and the liquid layer thickness on the sensitivity of the thermocapillary effect to the thermal conductivity of substrates is also studied. It was shown that the sensitivity of the photothermocapillary effect to the thermal conductivity of substrates increases with the power of the heating laser beam and decreases with increasing the thickness of the liquid layer. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Physics B Springer Journals

Laser-induced thermocapillary convection in thin liquid layers: effect of thermal conductivity of substrates

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany
Subject
Physics; Physics, general; Physical Chemistry; Optics, Lasers, Photonics, Optical Devices; Quantum Optics; Engineering, general
ISSN
0946-2171
eISSN
1432-0649
D.O.I.
10.1007/s00340-017-6809-5
Publisher site
See Article on Publisher Site

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