Modelling of the thermocapillary convection in a sessile drop induced by a laser beam

Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy


2019, Vol. 5. №2

Modelling of the thermocapillary convection in a sessile drop induced by a laser beam

For citation: Ivanova N. A., Malyuk A. Yu. 2019. “Modelling of the thermocapillary convection in a sessile drop induced by a laser beam”. Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy, vol. 5, no 2, pp. 160-174. DOI: 10.21684/2411-7978-2019-5-2-160-174

About the authors:

Natalya A. Ivanova, Cand. Sci. (Phys.-Math.), Associate Professor, Department of Applied and Technical Physics, Institute of Physics and Technology, Head of Photonics and Microfluidics Research Laboratory, X-BIO Institute, University of Tyumen; eLibrary AuthorID, ORCID, Web of Science ResearcherID, Scopus AuthorID,

Alexander Yu. Malyuk, Postgraduate Student, Department of Applied and Technical Physics, Junior Researcher of Photonics and Microfluidics Laboratory, University of Tyumen; ScopusID,


The results of the numerical study of thermocapillary convection induced by the local heat flux in a sessile drop of non-volatile liquid with a fixed contact line are presented. The laser beam absorbed by the liquid is used as the source of heat flux. Sessile drops of benzyl alcohol and ethylene glycol with a volume of 0.6 mcl and heat flux power from 2 to 85 mW are observed in this paper. The model allows obtaining both velocity and temperature fields for both liquid and gas phases upon thermocapillary convection, evolution of free surface profile upon thermocapillary deformation. The relations between the focal length of refractive surface of the sessile drop and the heat flux are obtained. The comparison of the numerical and experimental data of the focal length shows a good correlation between numerical model and the experiment.


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