Measurement of time response of helium-filled soap bubbles

Knud Erik Meyer*, Carl Oscar Meyer-Johansen, Ask Finderup

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

A new method is proposed for measuring the time response of helium-filled soap bubbles (HFSB). A flow of air with bubbles is led through a square flow channel and a two dimensional slit is introduced downstream in the channel. This creates a strong local flow acceleration. Bubble paths are tracked with a camera and the time response is found by comparing bubble speed and acceleration to the local flow speed. The method can be used in a portable setup for monitoring bubble quality during experiments. Bubbles from a new bubble generator design are tested. The generator produces mono-disperse bubbles with a low time response, but data also suggest that the generator needs further optimization. Air-filled soap bubbles (AFSB) are also tested and appear to have a smaller time response than earlier reports on AFSB.
Original languageEnglish
Title of host publicationConference Proceedings: 13th International Symposium on Particle Image Velocimetry (ISPIV 2019)
EditorsChristian J. Kähler, Rainer Hain, Sven Scharnowski, Thomas Fuchs
PublisherInstitute of Fluid Mechanics and Aerodynamics
Publication date2019
Pages855-861
DOIs
Publication statusPublished - 2019
Event13th International Symposium on Particle Image Velocimetry - Munich, Germany
Duration: 22 Jul 201924 Jul 2019
Conference number: 13

Conference

Conference13th International Symposium on Particle Image Velocimetry
Number13
CountryGermany
CityMunich
Period22/07/201924/07/2019

Cite this

Meyer, K. E., Meyer-Johansen, C. O., & Finderup, A. (2019). Measurement of time response of helium-filled soap bubbles. In C. J. Kähler, R. Hain, S. Scharnowski, & T. Fuchs (Eds.), Conference Proceedings: 13th International Symposium on Particle Image Velocimetry (ISPIV 2019) (pp. 855-861). Institute of Fluid Mechanics and Aerodynamics. https://doi.org/10.18726/2019_3