Ouro, PabloCea, LuisCroquer, SergioDong, WenhaoGarcía-Feal, OrlandoNavas Montilla, AdriánRogers, Benedict D.Uchida, TatsuhikoJuez, Carmelo2025-02-282025-02-282024Ouro, P., Cea, L., Croquer, S., Dong, W., Garcia-Feal, O., Navas-Montilla, A., … Juez, C. (2024). Benchmark of computational hydraulics models for open-channel flow with lateral cavities. Journal of Hydraulic Research, 62(5), 441–460. https://doi.org/10.1080/00221686.2024.2401905http://hdl.handle.net/2183/41293[Abstract:] 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.engAtribución-NoComercial-SinDerivadashttp://creativecommons.org/licenses/by-nc-nd/3.0/es/http://creativecommons.org/licenses/by-nc-nd/3.0/es/BenchmarkComputational hydraulicsLarge-eddy simulationLateral cavitiesReynolds-averaged Navier–StokesShallow water modelSPHjournal articleopen access10.1080/00221686.2024.2401905