Single-Camera 3D PTV Methods for Evaporation-Driven Liquid Flows in Sessile Droplets

Massimiliano Rossi*, Alvaro Marin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

Abstract

The experimental characterization of liquid flows in sessile evaporating droplets is an important task for the fundamental understanding of the complex phenomena occurring in these apparently simple systems. The liquid flow induced by the droplet evaporation has a strong three-dimensional character and conventional visualization methods are typically difficult to apply. A more effective approach is to look inside the droplets from the substrate where the droplet lies and use single-camera 3D particle tracking velocimetry (PTV) methods to reconstruct the whole flow field. This paper discusses the implementation of an experimental setup for the quantitative characterization of the flow inside sessile evaporating droplets based on two single-camera 3D PTV methods: the Astigmatic Particle Tracking Velocimetry (APTV) and the General Defocusing Particle Tracking (GDPT). Exemplary results on different types of sessile evaporating droplets are reported and discussed. The presented approach is easy to implement, does not require special or costly equipment, and has the potential to become a standard tool for this type of experiments.
Original languageEnglish
Title of host publicationDroplet Interactions and Spray Processes
Volume121
PublisherSpringer
Publication date2020
Pages225-236
ISBN (Print)978-3-030-33337-9
ISBN (Electronic)978-3-030-33338-6
DOIs
Publication statusPublished - 2020
SeriesFluid Mechanics and Its Applications
ISSN2215-0056

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