Multi-camera volumetric PIV for the study of jumping fish
Name
348_2017_2468_ReferencePDF.pdf
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21.1 MB
Format
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Checksum (MD5)
a1c064b1e87222cf703b95988b2d8e67
Author(s)
Mendelson, Leah Rose
Techet, Alexandra H
Date Issued
December 2017
Journal
Experiments in Fluids
Publisher
Springer Berlin Heidelberg
Citation
Mendelson, Leah, and Alexandra H. Techet. “Multi-Camera Volumetric PIV for the Study of Jumping Fish.” Experiments in Fluids, vol. 59, no. 1, Jan. 2018.
Version
Author's final manuscript
Abstract
Archer fish accurately jump multiple body lengths for aerial prey from directly below the free surface. Multiple fins provide combinations of propulsion and stabilization, enabling prey capture success. Volumetric flow field measurements are crucial to characterizing multi-propulsor interactions during this highly three-dimensional maneuver; however, the fish’s behavior also drives unique experimental constraints. Measurements must be obtained in close proximity to the water’s surface and in regions of the flow field which are partially-occluded by the fish body. Aerial jump trajectories must also be known to assess performance. This article describes experiment setup and processing modifications to the three-dimensional synthetic aperture particle image velocimetry (SAPIV) technique to address these challenges and facilitate experimental measurements on live jumping fish. The performance of traditional SAPIV algorithms in partially-occluded regions is characterized, and an improved non-iterative reconstruction routine for SAPIV around bodies is introduced. This reconstruction procedure is combined with three-dimensional imaging on both sides of the free surface to reveal the fish’s three-dimensional wake, including a series of propulsive vortex rings generated by the tail. In addition, wake measurements from the anal and dorsal fins indicate their stabilizing and thrust-producing contributions as the archer fish jumps.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/s00348-017-2468-x
