Ponderomotive convection in water induced by a CW laser

An optically induced convection during IR laser interaction with water or any absorbing liquid is described theoretically. The numerical simulations performed using the developed model show that the optical pressure and ponderomotive forces produce water flow in the direction of the laser beam propa...

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Bibliographic Details
Published in:Journal of applied physics 2016-12, Vol.120 (24)
Main Authors: Shneider, M. N., Semak, V. V.
Format: Article
Language:English
Subjects:
Applied physics
Computational fluid dynamics
Computer simulation
Convection
Gravitation theory
Laser beams
Lasers
Mathematical models
Ponderomotive forces
Water flow
Water temperature
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Description
Summary:An optically induced convection during IR laser interaction with water or any absorbing liquid is described theoretically. The numerical simulations performed using the developed model show that the optical pressure and ponderomotive forces produce water flow in the direction of the laser beam propagation. In the later stage of interaction, when the water temperature rises, the Archimedes force becomes comparable and, ultimately, dominant, producing convection directed against the vector of gravitational acceleration (upward). The theoretical estimates and numerical simulations predict fluid dynamics similar to what is observed in previous experiments.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4972969