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Journal of Visualization

Erschienen in:

28.09.2018 | Regular Paper

Vortical structures in the wake of falling plates

verfasst von: Edwin M. Lau, Jun-Duo Zhang, Yong-Xia Jia, Wei-Xi Huang, Chun-Xiao Xu

Erschienen in: Journal of Visualization | Ausgabe 1/2019

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Abstract

Flow visualization and particle image velocimetry are applied to capture the flow fields generated by all three states of a falling plate in two dimensional passive flight—fluttering, chaotic, and tumbling. The vortical structures are recorded in considerable clarity. Classic vortex shedding from different flight states are observed. The causes of more energetic tumbling mixing and localized fluttering disturbances are discussed. Strong, but small trailing processions of Karman vortex pairs or Kelvin–Helmholtz instabilities are found. It is also found that their formations are dependent on the trajectory, distinguishing the unique flow structures that different flight paths leave behind. The falling plate also induces a significant downwards convective motion. Further investigation shows that the wake trail and the convection contribute to the complex formation and dissipation of large vortical structures.

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Vorheriger Artikel Flow visualization using a Sanderson prism

Nächster Artikel Design of microfluidic viscometer based on pressure estimation

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Titel: Vortical structures in the wake of falling plates
verfasst von: Edwin M. Lau
Jun-Duo Zhang
Yong-Xia Jia
Wei-Xi Huang
Chun-Xiao Xu
Publikationsdatum: 28.09.2018
Verlag: Springer Berlin Heidelberg
Erschienen in: Journal of Visualization / Ausgabe 1/2019
Print ISSN: 1343-8875
Elektronische ISSN: 1875-8975
DOI: https://doi.org/10.1007/s12650-018-0520-4

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