20.500.12556/RUL-160065 Numerical modeling of laminar free overfall in triangular channels Design of open channel transport and flow measurement systems for highly viscous liquids requires accurate modelling of laminar free overfall. In this study, a computational fluid dynamics model was developed to investigate subcritical laminar free overfall in smooth horizontal channels with 90° isosceles triangle cross-section. Volume of fluid-based simulations were performed at different liquid discharges and viscosities, with Reynolds numbers at normal uniform depth between 5.5 and 139. Simulation results were in good agreement with verification experiments, indicating development of laminar velocity magnitude profiles while gauge pressure profiles resemble hydrostatic distribution except near the brink. The end-depth-ratio ranged between 0.80 and 0.96, reducing towards values reported for turbulent free overfall in the highest Reynolds number simulation. Existing models for critical depth, end depth discharge and free overfall jet trajectories were in satisfactory agreement above Re = 10, while producing larger deviations below this threshold due to increased viscous effects. free overfall open channel flow laminar flow computational fluid dynamics volume of fluid end depth ratio laminarni tok računalniška dinamika tekočin tok v odprtih kanalih true false true Angleški jezik Angleški jezik Članek v reviji 2024-08-14 10:50:20 2024-08-14 10:50:25 2025-01-23 22:27:55 0000-00-00 00:00:00 2024 0 0 11 str. iss. 4, art. 102650 Vol. 15 Apr. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 519.62:532 2090-4495 10.1016/j.asej.2024.102650 183107075 Dresar_..._Numerical_modeling_of_laminar_free_overfall_in_triangular_channel.pdf Dresar_..._Numerical_modeling_of_laminar_free_overfall_in_triangular_channel.pdf 1 7933492FA9BECEF044B5FBC77C57C5FA 93ee4512c193e6f7dd9d87838e92098be38a921e7fab3bd3aed0d7b050253b89 7457b0ec-5a1a-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=188497 https://www.sciencedirect.com/science/article/pii/S209044792400025X 1 125e6d14-5a1a-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=188496 Fakulteta za strojništvo 0 0 0