Solid sediment transport in turbulent channel flow over irregular rough boundaries

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

Risultato della ricerca: Article

5 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 Reτ=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
RivistaInternational Journal of Heat and Fluid Flow
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
  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cita questo

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title = "Solid sediment transport in turbulent channel flow over irregular rough boundaries",
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 Re{\"I}„=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.",
keywords = "Lagrangian tracking; Particle mass flux; Particle-laden flow; Point-particle DNS; Roughness; Turbulence; Condensed Matter Physics; Mechanical Engineering; Fluid Flow and Transfer Processes",
author = "Barbara Milici and Enrico Napoli and {De Marchis}, Mauro and Barbara Milici and {De Marchis}",
year = "2017",
language = "English",
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pages = "114--126",
journal = "International Journal of Heat and Fluid Flow",
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TY - JOUR

T1 - Solid sediment transport in turbulent channel flow over irregular rough boundaries

AU - Milici, Barbara

AU - Napoli, Enrico

AU - De Marchis, Mauro

AU - Milici, Barbara

AU - De Marchis, null

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 Reτ=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 Reτ=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 - Lagrangian tracking; Particle mass flux; Particle-laden flow; Point-particle DNS; Roughness; Turbulence; Condensed Matter Physics; Mechanical Engineering; Fluid Flow and Transfer Processes

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

M3 - Article

VL - 65

SP - 114

EP - 126

JO - International Journal of Heat and Fluid Flow

JF - International Journal of Heat and Fluid Flow

SN - 0142-727X

ER -