Modeling Steep-Slope Flow across Staggered Emergent Cylinders: Application to Fish Passes

Chorda, Jacques; Cassan, Ludovic; Laurens, Pascale

doi:10.1061/(asce)hy.1943-7900.0001630

Cited by 7 publications

(20 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present paper studied a rock-ramp-type fish pass and was based on the channel studied by Cassan et al [2] and Chorda et al [1]. The experimental device consisted of a 1 m width and a 7 m-long flume with its bottom covered with obstacles, as shown in Figure 1.…”

Section: Description Of the Cases Of Studymentioning

confidence: 99%

“…Rock-ramp fish passes are an economical and ecological alternative to unobstructed fish migrations and contribute to the good ecological condition of the rivers. They generally consist of a sloped bottom in which obstacles are staggered, arranged with the objective of providing energy dissipation and reducing flow velocity [1,2]. The obstacles also provide resting places for fishes swimming upstream [3].…”

Section: Introductionmentioning

confidence: 99%

“…Only relatively few 3D numerical studies investigating the turbulence generated in rock-ramp fish passes can be found in the literature. Among them, the studies of Baki et al [12] and Chorda et al [1] can be cited. Baki et al [12] studied the flow characteristics for variations in channel slopes and boulder sizes, spacing, and patterns by using the Reynolds-averaged Navier-Stokes (RANS) methodology.…”

Section: Introductionmentioning

confidence: 99%

“…They applied the k − as a turbulence model and the volume of fluid (VOF) method to treat the multiple phases. Furthermore, using the VOF, Chorda et al [1] presented a study of this type of fish pass comparing the turbulence methodology RANS with the shear stress transport (SST) k − ω model and large-eddy simulation (LES) with the Smagorinsky model. The authors demonstrated that both methodologies were able to capture the underlying physics well and predict the motion of flow features of the studied configuration.…”

Section: Introductionmentioning

confidence: 99%

“…Among the works found in the literature, spherical or semi-spherical boulders were mainly used [3,[8][9][10][11][12] others employed cylindrical obstacles [1], while square-shaped obstacles were barely used. In this sense, the purpose of this work was to investigate, in detail, the hydraulics behind such a ramp fishway with staggered arranged emergent square blocks and evaluate the importance of the shape of the obstacles in such a configuration.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Study of a Rock-Ramp Fish Pass with Staggered Emergent Square Obstacles

Miranda

Cassan

Laurens

et al. 2021

Water

Self Cite

View full text Add to dashboard Cite

A rock-ramp fish passage with square obstacles was experimentally and numerically studied in this work with the objective of investigating in detail the hydraulic behind such fishways and to evaluate the importance of the shape of the obstacles. The LES and VOF methods were used for the simulations, and for the measurements, shadowgraphy and ADV were applied. Two different validations were successfully performed. In the first one, the experimental and numerical results of a chosen case were compared in detail. In the second validation, the focus was given to the stage-discharge. Following the validation, a numerical study was carried out to point out the differences in the flow characteristics from a configuration with square and circular obstacles. The discharge was nearly the same for both configurations, which implies different water depths. The results showed a lower velocity field, lower turbulent kinetic energy, and lower lateral fluctuations for the configuration with square blocks, which indicated a better passability for this geometry. However, it also presented a higher water depth, which led to a less attractive discharge. The differences in the flow generated in the two configurations indicated that the shape is an important modifiable parameter to be considered in the design process.

show abstract

Section: Description Of the Cases Of Studymentioning

confidence: 99%