Share Email Print
cover

Proceedings Paper

Study of laser-induced thermocapillary convection using backscattered Doppler signal
Author(s): E. M. Chastookhin; Vyacheslav M. Gordienko; Nikolay N. Kurochkin; Vladislav Ya. Panchenko
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

As the result of free surface deformation during laser-induced thermocapillary convection process near-surface flow velocity vector has a non-zero projection on direction laser beam spreads. This property of liquid flow allows to measure the velocity of near-surface mass flow using the backscatter signal from surface particle inclusions and rippling induced by surface tension gradient. Similar to coherent Doppler wind lidar scheme measurements can be formed by high intensity irradiating a target surface (with consequent phase transition in the boundary layer zone) and observing the Doppler shift in the frequency of the radiation backscattered from scatters within interaction region. We have proposed the monostatic interaction scheme. In this case interaction and probe regions are equivalent precisely. Our paper is devoted in investigation of laser-induced-near-surface thermocapillary convection flow in such target materials as water, paraffin, naphthalene, ehyl alcohol and oil using Doppler backscattered signal detected by heterodyne method.

Paper Details

Date Published: 8 September 1994
PDF: 5 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185343
Show Author Affiliations
E. M. Chastookhin, Scientific Research Ctr. for Technological Lasers RAS (Russia)
Vyacheslav M. Gordienko, Moscow State Univ. (Russia)
Nikolay N. Kurochkin, Moscow State Univ. (Russia)
Vladislav Ya. Panchenko, Scientific Research Ctr. for Technological Lasers RAS (Russia)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

© SPIE. Terms of Use
Back to Top