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Direct and Large-Eddy Simulation XI pp 411–416Cite as

The Influence of the Reynolds Number on the Auto-Rotation of Samaras

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Part of the book series: ERCOFTAC Series ((ERCO,volume 25))

Abstract

As samara seeds fall from trees, they enter into auto-rotation. In this way they maximize dispersal distances (Green, Am J Bot 169:1218–1224, 1998, [2]). In this study, we present direct numerical simulations of the autorotation of a model samara at Reynolds numbers, Re, somewhat smaller than those observed in nature. The aim is to detect the presence of a LEV, if it exists, and to understand how the kinematics of the seed are related to the vortical structures of the flow.

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References

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Acknowledgements

This work was supported by grant TRA2013-41103-P of the Spanish Ministry of Economy and Competitiveness. This grant includes FEDER funding. MGV was partially supported by a grant of the BBVA Foundation. The code was partially developed during a stay of MM (funded by BBVA) and MGV (funded by the Spanish Ministry of Education through the program José Castillejo) at the Karlsruhe Institute of Technology.

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Authors and Affiliations

  1. Universidad Carlos III de Madrid, Getafe, Spain

    G. Arranz, M. Moriche, O. Flores & M. García-Villalba

  2. Karlsruhe Institue of Technology, Karlsruhe, Germany

    M. Uhlmann

Authors
  1. G. Arranz
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  2. M. Moriche
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  3. M. Uhlmann
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  4. O. Flores
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  5. M. García-Villalba
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Corresponding author

Correspondence to G. Arranz .

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Editors and Affiliations

  1. Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Pisa, Italy

    Maria Vittoria Salvetti

  2. Dipartimento di Ingegneria Civile e Ambientale, Università degli studi di Trieste, Trieste, Italy

    Vincenzo Armenio

  3. Institut für Strömungsmechanik, Technische Universität Dresden, Dresden, Germany

    Jochen Fröhlich

  4. Faculty of Electrical Engineering, Mathematics and Computer Science, Multiscale Modeling and Simulation, University of Twente, Enschede, The Netherlands

    Bernard J. Geurts

  5. Department of Mechanical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands

    Hans Kuerten

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Arranz, G., Moriche, M., Uhlmann, M., Flores, O., García-Villalba, M. (2019). The Influence of the Reynolds Number on the Auto-Rotation of Samaras. In: Salvetti, M., Armenio, V., Fröhlich, J., Geurts, B., Kuerten, H. (eds) Direct and Large-Eddy Simulation XI. ERCOFTAC Series, vol 25. Springer, Cham. https://doi.org/10.1007/978-3-030-04915-7_54

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  • DOI: https://doi.org/10.1007/978-3-030-04915-7_54

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-04914-0

  • Online ISBN: 978-3-030-04915-7

  • eBook Packages: EngineeringEngineering (R0)

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