Modelling of Pool-Type Fishways Flows: Efficiency and Scale Effects Assessment

In this study, the 3D numerical modelling of flow in a pool-type fishway with bottom orifices was performed using computational fluid dynamics (CFD) software (FLOW-3D®). Numerical results were compared experimental data obtained from acoustic Doppler velocimetry (ADV) and particle image (PIV) measurements. Several hydrodynamic variables that influence fishways efficiencies, such as depths, patterns, water velocity, turbulent kinetic energy, Reynolds normal stresses, shear stress parallel to component, qualitatively quantitatively compared. The model accurately reproduced complex field, showing an overall good agreement between predictions for analysed variables. importance performing validation all parameters under analyses highlighted. Additionally, scaling effects by running upscaled prototype fishway. similar accuracy both physical dimensions no evidence scale effects. present study concludes CFD models (namely FLOW-3D®) may be used adequate efficient design analysis tool new geometries, reducing complementing testing.