A submersible device for measuring drag forces on aquatic plants and other organisms
| Autor: | Nicolas Lamouroux, Emmanuel Malet, Bernhard Statzner, Vladimir Nikora, Barry J. F. Biggs, Pierre Sagnes, Glenn G. Cooper, John Radford, Fraser M. Callaghan |
|---|---|
| Přispěvatelé: | Martin Sempore, Brigitte, Laboratoire d'Ecologie des Hydrosystèmes Fluviaux (EHF), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Irstea Publications, Migration, National Institute of Water and Atmospheric Research [Christchurch] (NIWA), UNIVERSITY OF ABERDEEN GBR, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Biologie des écosystèmes aquatiques (UR BELY), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Université de Lyon, ZEBRA TECH LIMITED NELSON NZL |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
[SDE] Environmental Sciences
Drag coefficient 010504 meteorology & atmospheric sciences CEMAGREF LHQ Aquatic Science 01 natural sciences 010305 fluids & plasmas Cylinder (engine) law.invention Parasitic drag law Aquatic plant 0103 physical sciences Shear stress Geotechnical engineering 14. Life underwater Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Water Science and Technology EXPERIMENTAL FLUME Ecology BOUNDARY LAYER FLOW DRAG GAUGE BELY Gauge (firearms) Boundary layer Drag [SDE]Environmental Sciences PLANT DYNAMICS Environmental science Marine engineering FLOW-BIOTA INTERACTIONS |
| Zdroj: | New Zealand Journal of Marine and Freshwater Research New Zealand Journal of Marine and Freshwater Research, Royal Society of New Zealand, 2007, 41, pp.119-127 HAL |
| ISSN: | 0028-8330 |
| Popis: | This paper describes a device, the submersible drag gauge (SDG), that can be used for drag measurements in studies of flow-biota interactions at low (setup A) and high (setup B) load applications. The device is designed so that solely drag forces acting on a test object in a boundary layer flow are measured. The SDG can measure drag on organism(s), such as macrophtyes, crayfish or mussels, as well as a combination of such organisms and sediments assembled in a variety of arrangements in both laboratory and field conditions. Laboratory calibrations over the range of 0 to 4 showed that setup A registered forces as low as 0.02 N, whereas setup B often did not register forces up to c. 0.15 N. The relative standard error of drag measurements was 0.2 (setup A) or 1 (setup B). Using a rigid cylinder, and natural and artificial (plastic) Egeria densa as examples, showed how the SDG can serve in studies of flow-biota interactions such as drag-velocity relations, assessments of drag coefficients, or the frequency spectrum of macrophyte drag. Une balance de traînée submersible pour mesurer les forces subies par les plantes aquatiques et autres organismes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|