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!