Thermocapillary convection induced by laser surface heating

Thermocapillary convection was excited by a laser source in experiments on molten paraffin. The parameters of the resultant flow were determined. The nature of the flow was demonstrated to correspond to shear-driven boundary-layer flow at high Reynolds numbers. Correlation dependences of the flow ve...

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Bibliographic Details
Published inQuantum electronics (Woodbury, N.Y.) Vol. 28; no. 5; pp. 426 - 429
Main Authors Gladush, G G, Drobyazko, S V, Likhanskii, V V, Loboiko, A I, Senatorov, Yu M
Format Journal Article
LanguageEnglish
Published United States IOP Publishing 31.05.1998
Subjects
BOUNDARY LAYERS
CAPILLARY FLOW
CONVECTION
CORRELATIONS
DIMENSIONLESS NUMBERS
ELECTROMAGNETIC RADIATION
ENERGY TRANSFER
ENGINEERING
FLOW RATE
FLUID FLOW
HEAT TRANSFER
HEATING
LASER RADIATION
LAYERS
MASS TRANSFER
RADIATIONS
REYNOLDS NUMBER
SHEAR
STAGNATION
SURFACES
TEMPERATURE DISTRIBUTION
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Summary:Thermocapillary convection was excited by a laser source in experiments on molten paraffin. The parameters of the resultant flow were determined. The nature of the flow was demonstrated to correspond to shear-driven boundary-layer flow at high Reynolds numbers. Correlation dependences of the flow velocity of the melt and its temperature in the surface region were derived theoretically and were shown to agree with the experimental results. When the size of the laser spot was much less than the characteristic convection scales, three regions of flow of the melt could be distinguished: a viscous surface boundary layer, a stagnation zone under the laser spot, and a large-scale region of flow with a homogeneous temperature distribution. (interaction of laser radiation with matter. laser plasma)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE1998v028n05ABEH001241