A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Benchmark of computational hydraulics models for open-channel flow with lateral cavities
Computational models in hydro-environmental engineering are diverse in their background formulation and span from two-dimensional depth-averaged shallow water models, to complex fully three-dimensional turbulence models resolving large-eddy simulation with surface capturing techniques, and to Lagrangian particle-based methods. This paper presents a first-of-its-kind comparison of six different computational hydraulics fluid dynamics models, namely Iber+, HO-SWM, GBVC, OpenFOAM (RANS), Hydro3D (LES) and DualSPHysics (SPH), in the prediction of mean velocities and free-surface dynamics in two benchmarks involving open-channel flows with symmetric lateral cavities. Results show that shallow-water models capture relatively well the main large-scale coherent structures of the in-cavity flow, with wider shear layers compared to three-dimensional models, and higher velocities in the main channel. Three-dimensional RANS, LES and SPH yield improved predictions of mean velocities compared with experimental data. Computational cost has been quantified for all models with a logarithmic growth when increasing model complexity. The transverse standing wave is captured by most models, with the shallow-water ones matching the theoretical value, while the three-dimensional models overestimate it slightly.
Benchmark of computational hydraulics models for open-channel flow with lateral cavities
Computational models in hydro-environmental engineering are diverse in their background formulation and span from two-dimensional depth-averaged shallow water models, to complex fully three-dimensional turbulence models resolving large-eddy simulation with surface capturing techniques, and to Lagrangian particle-based methods. This paper presents a first-of-its-kind comparison of six different computational hydraulics fluid dynamics models, namely Iber+, HO-SWM, GBVC, OpenFOAM (RANS), Hydro3D (LES) and DualSPHysics (SPH), in the prediction of mean velocities and free-surface dynamics in two benchmarks involving open-channel flows with symmetric lateral cavities. Results show that shallow-water models capture relatively well the main large-scale coherent structures of the in-cavity flow, with wider shear layers compared to three-dimensional models, and higher velocities in the main channel. Three-dimensional RANS, LES and SPH yield improved predictions of mean velocities compared with experimental data. Computational cost has been quantified for all models with a logarithmic growth when increasing model complexity. The transverse standing wave is captured by most models, with the shallow-water ones matching the theoretical value, while the three-dimensional models overestimate it slightly.
Benchmark of computational hydraulics models for open-channel flow with lateral cavities
Ouro, Pablo (author) / Cea, Luis (author) / Croquer, Sergio (author) / Dong, Wenhao (author) / Garcia-Feal, Orlando (author) / Navas-Montilla, Adrián (author) / Rogers, Benedict D. (author) / Uchida, Tatsuhiko (author) / Juez, Carmelo (author)
Journal of Hydraulic Research ; 62 ; 441-460
2024-09-02
20 pages
Article (Journal)
Electronic Resource
English
Hydraulics of Open Channel Flow
| British Library Online Contents | 1999
| TIBKAT | 2021
| TIBKAT | 2001
| UB Braunschweig | 2021
| TIBKAT | 2010