20.500.12556/RUL-168243 Three-Dimensional Numerical Simulation of a Two-Phase Supercritical Open Channel Junction Flow Tri-dimenzionalno numerično modeliranje dvo-faznega toka na sotočju deročih tokov This study investigates the computational fluid dynamics (CFD) modeling of supercritical open channel junction flow using two different turbulence models: k-ω shear stress transport (SST) and k-ω SST scale-adaptive simulation (SAS), in conjunction with Volume of Fluid (VOF) and mixture multiphase models. The efficacy of these models in predicting the intricate free surface fluctuation and free surface elevation in a supercritical junction is evaluated through a comprehensive analysis of time-averaged free surface data obtained from CFD simulations and Light Detection and Ranging (LIDAR) measurements. The dimensionless Reynolds (Re) and Froude (Fr) numbers of the investigated scenario were Fr = 9 and Re = 5.1 × 104 for the main channel, and Fr = 6 and Re = 3.3 × 104 for the side channel. The results of the analysis demonstrated a satisfactory level of agreement with the experimental data. However, certain limitations associated with both CFD and LIDAR were identified. Specifically, the CFD performance was limited by the model’s incapacity to consider small-scale turbulent effects and to model air bubbles smaller than the cell size while the LIDAR measurements were limited by instrument range, inability to provide insight into what is happening below the water surface, and blind spots. Nonetheless, the k-ω SST turbulent model with the VOF multiphase model most closely matched the LIDAR results. computational fluid dynamics (CFD) supercritical flow open channel junction two-phase modeling LIDAR measurement računalniška dinamika tekočin deroči tok sotočje s prosto gladino dvo-fazni tok LIDAR meritve true false true Angleški jezik Slovenski jezik Članek v reviji 2025-04-04 14:19:10 2025-04-04 14:19:17 2025-04-07 11:09:50 0000-00-00 00:00:00 2024 0 0 18 str. iss. 12, art. 757 Vol. 16 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 626/627 2073-4441 10.3390/w16121757 200341251 Blagojevic_..._Three-Dimensional_Numerical_Simulation_....pdf Blagojevic_..._Three-Dimensional_Numerical_Simulation_....pdf 1 5C323BCF1DA9B6CDC27295DA3E092AC8 f8c153787b514917793941748367fb35c6f53eb370a7a8b78ce5457ed3472ccd d886fcb4-114e-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=201375 https://www.mdpi.com/2073-4441/16/12/1757 1 fb3b087e-114d-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=201374 Fakulteta za strojništvo Fakulteta za gradbeništvo in geodezijo 0 0 0