Application of Several Depth-Averaged Turbulence Models to Simulate Flow in Vertical Slot Fishways
Publication: Journal of Hydraulic Engineering
Volume 133, Issue 2
Abstract
Vertical slot fishways are hydraulic structures which allow the upstream migration of fish through obstructions in rivers. The velocity, water depth, and turbulence fields are of great importance in order to allow the fish swimming through the fishway, and therefore must be considered for design purposes. The aim of this paper is to assess the possibility of using a two-dimensional shallow water model coupled with a suitable turbulence model to compute the flow pattern and turbulence field in vertical slot fishways. Three depth-averaged turbulence models of different complexity are used in the numerical simulations: a mixing length model, a model, and an algebraic stress model. The numerical results for the velocity, water depth, turbulent kinetic energy, and Reynolds stresses are compared with comprehensive experimental data for three different discharges covering the usual working conditions of vertical slot fishways. The agreement between experimental and numerical data is very satisfactory. The results show the importance of the turbulence model in the numerical simulations, and can be considered as a useful complementary tool for practical design purposes.
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Acknowledgments
The writers would like to thank Fundación Pedro Barrié de la Maza and Fundación Caixa Galicia for their economical support.
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Published In
Journal of Hydraulic Engineering
Volume 133 • Issue 2 • February 2007
Pages: 160 - 172
Copyright
© 2007 ASCE.
History
Received: Feb 24, 2005
Accepted: Jun 6, 2006
Published online: Feb 1, 2007
Published in print: Feb 2007
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