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Thermocapilarity and radiative heat flux oscillations
Redondo Apraiz, José Manuel; Lopez Gonzalez-Nieto, Pilar; Mahjoub, Otman; Ryazantsev, Yuri S.; Garcia Velarde, Manuel
Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids
We present a detailled experimental study of the thermocapillary motion of an aniline drop in an stably stratified fluid sytem driven by a laser beam. The thermocapillary motion of drops is the result of the temperature dependence of the interfacial tension. If the surface of the drop is subject to thermal gradients, then non-equilibrium surface tension effects appear, which in some cases can move the drop. We measure some of the velocity induced fields , vorticity, oscilations and intermittency of this complex flow. The source of the no uniformity of the temperature of the surface can be, as is in this experiment, the non uniform heating of the floating drop by a laser beam. In recent years, the thermocapillary movement of bubbles and drops under the influence of laser radiation has received more experimental attention thanks to the improvement in the flow visualization techniques.
Peer Reviewed
Àrees temàtiques de la UPC::Física::Termodinàmica::Física de la transmissió de la calor
Heat--Convection
Radiation
Thermocapilarity Laser flow PIV Heat convection Radiation Bouyant oscillations
Calor--Convecció
Radiació
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
         

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