74th Annual Meeting of the APS Division of Fluid Dynamics (November 21, 2021 — November 23, 2021)

V0046: Simultaneous imaging of zooplankton morphology and wakes through 3D scanning particle image velocimetry

Authors

• Matthew Fu, Caltech
• Isabel Houghton, Sofar Ocean
• Kevin Du Clos, University of Oregon
• Kelly Sutherland, University of Oregon
• John Dabiri, Caltech

DOI: https://doi.org/10.1103/APS.DFD.2021.GFM.V0046

In this video, we show how 3D scanning particle image velocimetry can be used to simultaneously image zooplankton morphology and their wakes.

The techqniue relies on a laser sheet that rapidly scans through the volume of interest, selectively illuminating slices of seed particles and cross-sections of the swimmers. These images slices are captured by a single high-speed camera, encoding information about the third spatial dimension within the image time-series.

We demonstrate the capabilities of the technique with measurements of a swimming jellyfish (Mitrocoma cellularia) and an induced vertical migration of millimeter-scale brine shrimp (Artemia salina).

For more information, you can check out our recent paper:

Fu, M. K, Houghton, I. A., and Dabiri, J. O. (2021) “A single-camera, 3D scanning velocimetry system for quantifying active particle aggregations,” Experiments in Fluids 62: 168. https://doi.org/10.1007/s00348-021-03256-x

or our recorded talk from APS DFD 2020 :

Fu, M. K., Houghton, I. A., and Dabiri, J. O. (2020) “Quantifying biogenic turbulence through 3D scanning particle image velocimetry,” 73rd Annual Meeting of the APS Division of Fluid Dynamics.

Thanks for watching!