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Educational Programme
Final Grade
Year of Graduation
Aleksandra Gavrilina
Studying Hydrothermal Waves in an Evaporating Sessile Drop by Computer Simulation
Applied Mathematics
(Bachelor’s programme)
Over the past decade hydrothermal waves (HTWs) in evaporating droplets have

been intensively studied experimentally, theoretically and numerically. We study transient

internal flows in an axially symmetrical evaporating sessile droplet of capillary size.

The diffusion of vapor in air, the hydrodynamics of an evaporating sessile drop, heat

conduction effects in all three phases, and thermal radiation have been considered. The

equations have been solved numerically by finite element method (FEM) using ANSYS

Fluent for three-dimensional droplet. To verify the model and algorithms, the flows in

the drop are simulated and compared with the experimental results. The findings of

the research illustrate how model parameters, such as the substrate temperature, may

influence wave patterns in the droplet. The obtained results may be useful for further

research of HTWs and investigations of nanoparticle solutions droplet evaporation.

This work was supported by grant № 18-71-10061 from the Russian Science Foundation.

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