0000000000470394

AUTHOR

Gaetano Sardina

showing 3 related works from this author

Particle-Laden Turbulent Channel Flow with Wall-Roughness

2015

Turbulent flows transporting a dispersed-phase are found in many environmental applications and engineering devices. Particle-laden flows are characterized by several peculiar phenomenologies such as preferential particle concentration and turbulence modulation of the carrier-phase due to the presence of the inertial particles [1].

Physics::Fluid DynamicsFlow separationMaterials scienceChézy formulaTurbulenceModulationPhysics::Space PhysicsParticleMechanicsSurface finishOpen-channel flowPipe flow
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Effects of roughness on particle dynamics in turbulent channel flows: a DNS analysis

2014

AbstractDeposition and resuspension mechanisms in particle-laden turbulent flows are dominated by the coherent structures arising in the wall region. These turbulent structures, which control the turbulent regeneration cycles, are affected by the roughness of the wall. The particle-laden turbulent flow in a channel bounded by irregular two-dimensional rough surfaces is analysed. The behaviour of dilute dispersions of heavy particles is analysed using direct numerical simulations (DNS) to calculate the three-dimensional turbulent flow and Lagrangian tracking to describe the turbophoretic effect associated with two-phase turbulent flows in a complex wall-bounded domain. Turbophoresis is inves…

PhysicsParticle statisticsTurbulenceMechanical Engineeringmedia_common.quotation_subjectParticle-laden flowsProbability density functionMechanicsCondensed Matter PhysicsTracking (particle physics)Inertiamultiphase and particle-laden flows particle/fluid flows turbulent flowsPhysics::Fluid DynamicsMechanics of MaterialsParticleParticle velocitymedia_commonJournal of Fluid Mechanics
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Interaction between turbulent structures and particles in roughened channel

2016

Abstract The distribution of inertial particles in turbulent flows is highly non-uniform and is driven by the local dynamics of the turbulent structures of the underlying carrier flow field. In the specific context of dilute particle-laden wall-bounded flows, deposition and resuspension mechanisms are dominated by the interaction between inertial particles and coherent turbulent structures characteristic of the wall region. The macroscopic behavior of these two-phase systems is influenced by particle inertia, which plays a role at the microscale of a single dispersed element. These turbulent structures, which control the turbulent regeneration cycles, are strongly affected by the wall rough…

DNSmedia_common.quotation_subjectDirect numerical simulationGeneral Physics and AstronomyContext (language use)Lagrangian particle trackingInertia01 natural sciencesSettore ICAR/01 - Idraulica010305 fluids & plasmasPhysics::Fluid DynamicsPhysics and Astronomy (all)symbols.namesake0103 physical sciences010306 general physicsDispersion (water waves)media_commonFluid Flow and Transfer ProcessesPhysicsTurbulenceMechanical EngineeringParticle-laden flowReynolds numberMechanicsTurbulenceClassical mechanicssymbolsParticleLagrangian trackingParticle mass fluxRoughneInternational Journal of Multiphase Flow
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