A first simulation of a model aquatic canopy at high Cauchy number
| Autor: | Löhrer, B., D., Doppler, Puijalon, Sara, N., Rivière, J.J.S., Jerome, J., Fröhlich |
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| Přispěvatelé: | Institute of Fluid Mechanics [Dresden], Technische Universität Dresden = Dresden University of Technology (TU Dresden), Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Équipe 2 - Écologie Végétale et Zones Humides (EVZH), Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS), Wim Uijttewaal, Mário J. Franca, Daniel Valero, Victor Chavarrias, Clàudia Ylla Arbós, Ralph Schielen, Alessandra Crosato |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | River Flow 2020-Proceedings of the 10th Conference on Fluvial Hydraulics Wim Uijttewaal; Mário J. Franca; Daniel Valero; Victor Chavarrias; Clàudia Ylla Arbós; Ralph Schielen; Alessandra Crosato. River Flow 2020-Proceedings of the 10th Conference on Fluvial Hydraulics, CRC Press, pp.2464, 2020, River Flow 2020-Proceedings of the 10th Conference on Fluvial Hydraulics, 978-0-367-62773-7. ⟨10.1201/b22619⟩ |
| DOI: | 10.1201/b22619⟩ |
| Popis: | International audience; Canopies formed by flexible aquatic plants constitute an important element in river hydraulics as they determine resistance, resilience towards erosion, transport of nutrients and pollutants, and provide the habitat of other species. Due to their flexibility they undergo re- configuration and closely interact with the surrounding flow. This fluid-structure-coupling poses a considerable challenge to detailed numerical modelling. In the present contribution a recently de- veloped own method is presented capable of numerically simulating such a situation. It is applied to a model configuration composed of very long flexible blades which corresponds to an experi- ment presently conducted in Lyon. A particularity of this situation, so far considered only rarely, is the length and high flexibility of the blades leading to a Cauchy number Ca around 25,000. The parameters are such that the monami phenomenon is observed featuring synchronized undulating motion of the blades. This very detailed simulation at high Ca is the first of its kind with very long, flat blades typical for aquatic plants. The contribution reports first results for the velocity field in terms of highly resolved instantaneous data and one-point statistics. |
| Databáze: | OpenAIRE |
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