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Open AccessArticle

A Numerical Study of Fluid Flow in a Vertical Slot Fishway with the Smoothed Particle Hydrodynamics Method

1
Faculty of Civil and Geodetic Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia
2
School of Applied Engineering and Technology, New Jersey Institute of Technology, Newark, NJ 07103, USA
3
EPHYSLAB Environmental Physics Laboratory, University of Vigo, 32004 Ourense, Spain
*
Authors to whom correspondence should be addressed.
Water 2019, 11(9), 1928; https://doi.org/10.3390/w11091928
Received: 27 July 2019 / Revised: 9 September 2019 / Accepted: 10 September 2019 / Published: 15 September 2019
(This article belongs to the Section Hydraulics)
Fishways have a great ecological importance as they help mitigate the interruptions of fish migration routes. In the present work, the novel DualSPHysics v4.4 solver, based on the smoothed particle hydrodynamics method (SPH), has been applied to perform three-dimensional (3-D) simulations of water flow in a vertical slot fishway (VSF). The model has been successfully calibrated against published field data of flow velocities that were measured with acoustic Doppler velocity probes. A state-of-the-art algorithm for the treatment of open boundary conditions using buffer layers has been applied to accurately reproduce discharges, water elevations, and average velocity profiles (longitudinal and transverse velocities) within the observed pool of the VSF. Results herein indicate that DualSPHysics can be an accurate tool for modeling turbulent subcritical free surface flows similar to those that occur in VSF. A novel relation between the number of fluid particles and the artificial viscosity coefficient has been formulated with a simple logarithmic fit. View Full-Text
Keywords: fish passages; vertical slot fishway; numerical model; SPH; fluid particles; artificial viscosity fish passages; vertical slot fishway; numerical model; SPH; fluid particles; artificial viscosity
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Novak, G.; Tafuni, A.; Domínguez, J.M.; Četina, M.; Žagar, D. A Numerical Study of Fluid Flow in a Vertical Slot Fishway with the Smoothed Particle Hydrodynamics Method. Water 2019, 11, 1928.

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