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RESEARCH PRODUCT

Numerical Simulations of the Flow Field of a Submerged Hydraulic Jump over Triangular Macroroughnesses

Mehdi DasinehAmir GhaderiCostanza AricòFrancesco Aristodemo

subject

velocitylcsh:Hydraulic engineering010504 meteorology & atmospheric sciencesGeography Planning and Development0207 environmental engineering02 engineering and technologyAquatic Science01 natural sciencesBiochemistrySettore ICAR/01 - IdraulicaPhysics::Fluid Dynamicssymbols.namesakelcsh:Water supply for domestic and industrial purposeslcsh:TC1-978triangular macroroughnesseShear stressFroude numberStreamlines streaklines and pathlines020701 environmental engineeringHydraulic jump0105 earth and related environmental sciencesWater Science and Technologylcsh:TD201-500TKEbed shear stress coefficientFLOW-3D modelsubmerged hydraulic jumpTurbulenceMechanicsSupercritical flowTurbulence kinetic energyJumpsymbolsGeologytriangular macroroughnesses

description

The submerged hydraulic jump is a sudden change from the supercritical to subcritical flow, specified by strong turbulence, air entrainment and energy loss. Despite recent studies, hydraulic jump characteristics in smooth and rough beds, the turbulence, the mean velocity and the flow patterns in the cavity region of a submerged hydraulic jump in the rough beds, especially in the case of triangular macroroughnesses, are not completely understood. The objective of this paper was to numerically investigate via the FLOW-3D model the effects of triangular macroroughnesses on the characteristics of submerged jump, including the longitudinal profile of streamlines, flow patterns in the cavity region, horizontal velocity profiles, streamwise velocity distribution, thickness of the inner layer, bed shear stress coefficient, Turbulent Kinetic Energy (TKE) and energy loss, in different macroroughness arrangements and various inlet Froude numbers (1.7 &lt

yearjournalcountryeditionlanguage
2021-03-01Water
https://doi.org/10.3390/w13050674