### Abstract

Language | English |
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State | Published - 2010 |

Event | conference; Lecture given at: Contactgroep Turbulentie, TU-Delft; 2010-10-04; 2010-10-04 - Duration: 4 Oct 2010 → 4 Oct 2010 |

### Conference

Conference | conference; Lecture given at: Contactgroep Turbulentie, TU-Delft; 2010-10-04; 2010-10-04 |
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Period | 4/10/10 → 4/10/10 |

Other | Lecture given at: Contactgroep Turbulentie, TU-Delft |

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### Cite this

*LES of a particle-laden turbulent channel flow*. conference; Lecture given at: Contactgroep Turbulentie, TU-Delft; 2010-10-04; 2010-10-04, .

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**LES of a particle-laden turbulent channel flow.** / Vreman, A.W.; Geurts, B.J.; Deen, N.G.; Kuipers, J.A.M.

Research output: Contribution to conference › Other › Academic

TY - CONF

T1 - LES of a particle-laden turbulent channel flow

AU - Vreman,A.W.

AU - Geurts,B.J.

AU - Deen,N.G.

AU - Kuipers,J.A.M.

PY - 2010

Y1 - 2010

N2 - Large-eddy simulations of a vertical turbulent channel flow with 420,000 solid particles are performed in order to get insight into fundamental aspects of a riser flow The question is addressed whether collisions between particles are important for the ow statistics. The turbulent channel ow corresponds to a particle volume fraction of 0.013 and a mass load ratio of 18, values that are relatively high compared to recent literature on large-eddy simulation of two-phase ows. In order to simulate this ow, we present a formulation of the equations for compressible ow in a porous medium including particle forces. These equations are solved with LES using a Taylor approximation of the dynamic subgrid-model. The results show that due to particle-uid interactions the boundary layer becomes thinner, leading to a higher skin-friction coefcient. Important effects of the particle collisions are also observed, on the mean uid prole, but even more o on particle properties. The collisions cause a less uniform particle concentration and considerably atten the mean solids velocity prole.

AB - Large-eddy simulations of a vertical turbulent channel flow with 420,000 solid particles are performed in order to get insight into fundamental aspects of a riser flow The question is addressed whether collisions between particles are important for the ow statistics. The turbulent channel ow corresponds to a particle volume fraction of 0.013 and a mass load ratio of 18, values that are relatively high compared to recent literature on large-eddy simulation of two-phase ows. In order to simulate this ow, we present a formulation of the equations for compressible ow in a porous medium including particle forces. These equations are solved with LES using a Taylor approximation of the dynamic subgrid-model. The results show that due to particle-uid interactions the boundary layer becomes thinner, leading to a higher skin-friction coefcient. Important effects of the particle collisions are also observed, on the mean uid prole, but even more o on particle properties. The collisions cause a less uniform particle concentration and considerably atten the mean solids velocity prole.

M3 - Other

ER -