0000000000241997

AUTHOR

Roberto Gaudio

showing 2 related works from this author

Effect of the junction angle on turbulent flow at a hydraulic confluence

2018

Despite the existing knowledge concerning the hydrodynamic processes at river junctions, there is still a lack of information regarding the particular case of low width and discharge ratios, which are the typical conditions of mountain river confluences. Aiming at filling this gap, laboratory and numerical experiments were conducted, comparing the results with literature findings. Ten different confluences from 45 ∘ to 90 ∘ were simulated to study the effects of the junction angle on the flow structure, using a numerical code that solves the 3D Reynolds Averaged Navier-Stokes (RANS) equations with the k- ϵ turbulence closure model. The results showed that the higher the junction angle, the …

channel confluences; junction angle; flow deflection zone; flow retardation zone; flow separation zone; numerical modelling; PANORMUSlcsh:Hydraulic engineering010504 meteorology & atmospheric sciences0208 environmental biotechnologyGeography Planning and DevelopmentPANORMUS02 engineering and technologyAquatic ScienceFlow retardation zone01 natural sciencesBiochemistryFlow separation zoneSettore ICAR/01 - Idraulicalcsh:Water supply for domestic and industrial purposesDeflection (engineering)lcsh:TC1-978Junction angleTributarySeparation zone0105 earth and related environmental sciencesWater Science and Technologygeographylcsh:TD201-500geography.geographical_feature_categoryTurbulenceChannel confluenceMechanics020801 environmental engineeringNumerical modellingConfluenceFlow deflection zoneReynolds-averaged Navier–Stokes equationschannel confluencesGeology
researchProduct

Experimental and Numerical Study on the Flow Field and Friction Factor in a Pressurized Corrugated Pipe

2015

An experimental campaign including measurement of pressure drops and velocity profiles was conducted on the pressurized flow in a commercial corrugated pipe. The results show that the empirical graphs suggested by Morris in the fifties may produce inaccurate assessments of the friction factor, in particular, for low Reynolds numbers. The experimental data was then reproduced by means of a numerical model with the large eddy simulation (LES) technique. The friction factor behavior for low and relatively high Reynolds numbers was thus investigated. The numerical simulations were in good agreement with the experimental results, showing the LES suitability to predict the effect of the pipe wall…

Friction factorEngineeringCorrugated pipeMean squared errorbusiness.industryMechanical EngineeringLarge eddy simulationExperimental dataReynolds numberMechanicsReynolds stressLaboratory experimentSettore ICAR/01 - IdraulicaPhysics::Fluid DynamicsFriction factorsymbols.namesakePressurized flowRange (statistics)symbolsGeotechnical engineeringMean flowbusinessWater Science and TechnologyCivil and Structural EngineeringLarge eddy simulationJournal of Hydraulic Engineering
researchProduct