Effect of delay of the thermocapillary response of a transparent liquid layer during laser heating of the absorbing substrate |
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Authors: | B A Bezuglyi S I Chemodanov |
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Institution: | (1) Tyumen State University, Tyumen, 625003, Russia |
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Abstract: | The effect of delay in the thermocapillary response of a transparent liquid layer on an absorbing substrate during its heating
by a laser beam is discovered. The response is an interference pattern formed on a screen placed in the beam cross section
by the beam reflected from a thermocapillary dip. It is found that the delay time of the response of a thin (h < 1.8 mm) layer of a liquid in a viscosity range of 3–6 mPa s to a 20.9-mW exciting beam from a He-Ne laser (λ = 633 nm)
is proportional to the squared layer thickness with a proportionality factor depending on the viscosity and thermal diffusivity
of the liquid. |
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Keywords: | |
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