A novel H-shape fishway with excellent hydraulic characteristics

Abstract Fishway design not only takes into account the swimming abilities of target fishes, but also considers hydrodynamic characteristics within fishway. In this study, flow fields one vertical-slot fishway ( i.e. VSF), five T-shape fishways TSF-1~TSF-5) and two H-shape (i.e. HSF-1 HSF-2) are numerically simulated by solving three-dimensional Reynolds-averaged Navier-Stokes equations K-Omega-SST turbulence model. The numerical results clearly indicate that properties HSF-2 overall superior to remaining seven cases, in terms time-averaged pattern, velocity magnitude, depth-mean magnitude along section, volume percentages less than some critical values, distribution turbulent kinetic energy. Therefore, is more friendly for fishes with relatively smaller sizes weaker capacities transfer upstream. novel firstly proposed paper, it naturally designed during process improving regime. Furthermore, generalizability superiority over VSF original TSF-1) has been exhibited aid four operating conditions Q = 400 L/s, 600 800 L/s 1000 L/s).