20.500.12556/RUL-127523 3-D numerical study of a bottom ramp fish passage using smoothed particle hydrodynamics Worldwide, the overwhelming number of man-made barriers in fluvial systems has been identified as one of the major causes of the reported staggering average declines of migratory fish. Fish passages have been shown to help mitigate such problems. Close-to-nature types of fish passages, such as bottom ramps, bypass channels, and fish ramps can be used to minimize the impact of artificial steep drops (e.g., weirs) on the migration of aquatic fauna, especially in cases of low-head barriers. This study focuses on the characterization of the flow pattern in a bottom ramp. A 3-D numerical model based on the meshless smoothed particle hydrodynamics (SPH) method was successfully validated and then employed for the simulation of turbulent free-surface flow in a straight channel with complex geometry. The effects of bed roughness, channel slope, and flow rate were quantified in terms of flow depth, velocity fields, and area velocity ratios. During the study, several new tools were developed, leading to new functionalities in pre-processing, solver, and post-processing which increase the applicability of DualSPHysics in the field of eco-hydraulics. 3D numerical model SPH method fish pass fish passages bottom ramp smoothed particle hydrodynamics DualSPHysics fish migration 3D numerični model metoda SPH ribja steza true false true Angleški jezik Slovenski jezik Članek v reviji 2021-06-11 15:59:28 2021-06-11 15:59:35 2022-09-06 03:51:47 0000-00-00 00:00:00 2021 0 0 19 str. iss. 11, art. 1595 Vol. 13 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532 2073-4441 10.3390/w13111595 66775299 RAZ_Novak_Gorazd_2021.pdf RAZ_Novak_Gorazd_2021.pdf 1 6C074C6C75FC832EB458E5637973E3A6 85aebb0da2184893f3c66c8b1db2b2b75cbeefc2313a9ae6921608275299a481 4bb580ce-ab5e-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154896 https://www.mdpi.com/2073-4441/13/11/1595 1 2b67b02d-cabd-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=143939 Fakulteta za gradbeništvo in geodezijo 0 0 0