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research article

DNS of buoyancy-driven flows and Lagrangian particle tracking in a square cavity at high Rayleigh numbers

Puragliesi, R.
•
Dehbi, A.
•
Leriche, E.
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2011
International Journal Of Heat And Fluid Flow

In this work we investigate numerically particle deposition in the buoyancy driven flow of the differentially heated cavity (DHC). We consider two values of the Rayleigh number (Ra = 10(9), 10(10)) and three values of the particle diameter (d(p) = 15, 25, 35 [mu m]). We consider the cavity filled with air and particles with the same density of water rho(w) = 1000 [kg/m(3)] (aerosol). We use direct numerical simulations (DNS) for the continuous phase, and we solve transient Navier-Stokes and energy transport equations written in an Eulerian framework, under the Boussinesq approximation, for the viscous incompressible Newtonian fluid with constant Prandtl number (Pr = 0.71). First- and second-order statistics are presented for the continuous phase as well as important quantities like turbulent kinetic energy (TKE) and temperature variance with the associated production and dissipation fields. The TKE production shows different behaviour at the two Rayleigh numbers.

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Type
research article
DOI
10.1016/j.ijheatfluidflow.2011.06.007
Web of Science ID

WOS:000295569200006

Author(s)
Puragliesi, R.
Dehbi, A.
Leriche, E.
Soldati, A.
Deville, M. O.
Date Issued

2011

Published in
International Journal Of Heat And Fluid Flow
Volume

32

Start page

915

End page

931

Subjects

Natural convection

•

Dns

•

Particle deposition

•

Enclosure

•

Aerosol

•

Differentially Heated Cavity

•

Turbulence Natural-Convection

•

Non-Boussinesq Conditions

•

Tall Vertical Enclosure

•

Direct Stokes Solvers

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Linear Shear-Flow

•

Benchmark Problem

•

Channel Flow

•

Severe Accident

•

Air

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
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Available on Infoscience
December 16, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/73480
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