Visualizing large-scale flow using synthetic aperture PIV

Josje van Houwelingen, Ad Holten, Herman Clercx, Rudie Kunnen, Jaap Molenaar, Willem van de Water (Corresponding author)

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Abstract

We discuss the application of synthetic aperture particle image velocimetry for measuring the flow around human swimmers using small bubbles as tracer. We quantify the two-dimensional projection of the velocity field in planes perpendicular to the viewing direction of an array of six cameras. With help of simulations, modelled after the experiment, we address questions about depth selectivity and occlusion in dense bubble fields. Using vortex rings in the swimming pool, we provide a proof of principle of the method. It is further illustrated by the vorticity field produced by a human swimmer.
Original languageEnglish
Article number1
Number of pages14
JournalExperiments in Fluids
Volume61
Issue number1
DOIs
Publication statusPublished - Jan 2020

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