Solid sediment transport in turbulent channel flow over irregular rough boundaries

Enrico Napoli, Barbara Milici, De Marchis, Barbara Milici, Mauro De Marchis

Risultato della ricerca: Article

6 Citazioni (Scopus)

Abstract

The presence of a loading of dispersed particles in a turbulent flow affects the dynamics of the carrier flow field which, in turn, drives grains movement. The focus of the paper is on the analysis of the coupling effects between near-bed turbulence structures and the dynamics of dispersed suspended solid particles in wall-bounded turbulent multiphase flows. We consider turbulent horizontal channel flows bounded by rough boundaries. The friction Reynolds number of the unladen flow is ReÏ=180 and the dispersed phase spans one order of magnitude of particle diameter. To analyze sedimentation and suspended phase transport, we adopt concepts and modeling ideas derived from the Euler-Lagrange approach, using Direct Numerical Simulations (DNS) for the carrier phase coupled with Lagrangian Particle Tracking (LPT) for the dispersed phase. The analysis takes into account fluid-particle interaction (two-way coupling) in the frame of the Particle-Source-In-Cell (PSIC) method. The effect of the wall's roughness is taken into account modeling the elastic rebound of particles onto it, instead of using a virtual rebound model.
Lingua originaleEnglish
pagine (da-a)114-126
Numero di pagine13
RivistaDefault journal
Volume65
Stato di pubblicazionePublished - 2017

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sediment transport
Sediment transport
channel flow
Channel flow
Particle interactions
Multiphase flow
Direct numerical simulation
Sedimentation
Turbulent flow
Flow fields
Reynolds number
Turbulence
Surface roughness
Friction
Fluids
multiphase flow
particle interactions
direct numerical simulation
turbulent flow
beds

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cita questo

Napoli, E., Milici, B., De Marchis, Milici, B., & De Marchis, M. (2017). Solid sediment transport in turbulent channel flow over irregular rough boundaries. Default journal, 65, 114-126.

Solid sediment transport in turbulent channel flow over irregular rough boundaries. / Napoli, Enrico; Milici, Barbara; De Marchis; Milici, Barbara; De Marchis, Mauro.

In: Default journal, Vol. 65, 2017, pag. 114-126.

Risultato della ricerca: Article

Napoli, E, Milici, B, De Marchis, Milici, B & De Marchis, M 2017, 'Solid sediment transport in turbulent channel flow over irregular rough boundaries', Default journal, vol. 65, pagg. 114-126.
Napoli, Enrico ; Milici, Barbara ; De Marchis ; Milici, Barbara ; De Marchis, Mauro. / Solid sediment transport in turbulent channel flow over irregular rough boundaries. In: Default journal. 2017 ; Vol. 65. pagg. 114-126.
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AU - Napoli, Enrico

AU - Milici, Barbara

AU - De Marchis, null

AU - Milici, Barbara

AU - De Marchis, Mauro

PY - 2017

Y1 - 2017

N2 - The presence of a loading of dispersed particles in a turbulent flow affects the dynamics of the carrier flow field which, in turn, drives grains movement. The focus of the paper is on the analysis of the coupling effects between near-bed turbulence structures and the dynamics of dispersed suspended solid particles in wall-bounded turbulent multiphase flows. We consider turbulent horizontal channel flows bounded by rough boundaries. The friction Reynolds number of the unladen flow is ReÏ=180 and the dispersed phase spans one order of magnitude of particle diameter. To analyze sedimentation and suspended phase transport, we adopt concepts and modeling ideas derived from the Euler-Lagrange approach, using Direct Numerical Simulations (DNS) for the carrier phase coupled with Lagrangian Particle Tracking (LPT) for the dispersed phase. The analysis takes into account fluid-particle interaction (two-way coupling) in the frame of the Particle-Source-In-Cell (PSIC) method. The effect of the wall's roughness is taken into account modeling the elastic rebound of particles onto it, instead of using a virtual rebound model.

AB - The presence of a loading of dispersed particles in a turbulent flow affects the dynamics of the carrier flow field which, in turn, drives grains movement. The focus of the paper is on the analysis of the coupling effects between near-bed turbulence structures and the dynamics of dispersed suspended solid particles in wall-bounded turbulent multiphase flows. We consider turbulent horizontal channel flows bounded by rough boundaries. The friction Reynolds number of the unladen flow is ReÏ=180 and the dispersed phase spans one order of magnitude of particle diameter. To analyze sedimentation and suspended phase transport, we adopt concepts and modeling ideas derived from the Euler-Lagrange approach, using Direct Numerical Simulations (DNS) for the carrier phase coupled with Lagrangian Particle Tracking (LPT) for the dispersed phase. The analysis takes into account fluid-particle interaction (two-way coupling) in the frame of the Particle-Source-In-Cell (PSIC) method. The effect of the wall's roughness is taken into account modeling the elastic rebound of particles onto it, instead of using a virtual rebound model.

KW - Condensed Matter Physics

KW - Fluid Flow and Transfer Processes

KW - Lagrangian tracking

KW - Mechanical Engineering

KW - Particle mass flux

KW - Particle-laden flow

KW - Point-particle DNS

KW - Roughness

KW - Turbulence

UR - http://hdl.handle.net/10447/260750

M3 - Article

VL - 65

SP - 114

EP - 126

JO - Default journal

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