Abstract
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.
Highlights
Fishways have a great ecological importance as they help mitigate the interruptions of fish migration routes
The simulations presented in this paper were performed using DualSPHysics software [40], which is an established open-source parallel computational fluid dynamics (CFD) solver based on Smoothed particle hydrodynamics, a Lagrangian meshless method
Results from smoothed particle hydrodynamics method (SPH) simulations are evaluated primarily based on the obtained velocity profiles, as these were measured in the field with much greater accuracy than Q and H
Summary
Gorazd Novak 1 , Angelantonio Tafuni 2, * , José M. Domínguez 3 , Matjaž Četina 1 and. Received: 27 July 2019; Accepted: 10 September 2019; Published: 15 September 2019
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