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An experimental study of turbulent flow in vertical slot fishways

Tarrade, Laurent and Texier, Alain and David, Laurent and Pineau, Gérard and Larinier, Michel An experimental study of turbulent flow in vertical slot fishways. (2006) In: 12th International Symposium on Flow Visualization , 10 September 2006 - 14 September 2006 (Göttingen, Germany).

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Abstract

The vertical slot fishways are hydraulic structures that allow the upstream migration of fishes through engineering constructions or natural obstructions in rivers. This type of pool fish pass is generally very effective in ensuring passage of the target species, particularly diadromous species. However, visual observations have shown that certain small species may be trapped in the large recirculation zones and seem to have difficulty in rapidly passing through very large pools. An experimental study was undertaken to characterize the turbulent flow for various configurations of vertical slot fishways and to determine how their characteristics might be modified in order to facilitate the passage of small species. The characteristics of mean flow and turbulence were studied by PIV and visualizations for several different slopes, flow discharges and pool widths. The results showed that the flow pattern always takes one of two topology models depending on the ratio length/width of the pool. In order to study the extent to which the dimensions of recirculation zones can be reduced, the effect of the insertion of vertical cylinders within the pools was visualized.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-00974484
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Mécanique et d'Aérotechnique - ENSMA (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université de Poitiers (FRANCE)
Laboratory name:
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Deposited By: Dominique COURRET
Deposited On:07 Apr 2014 07:40

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