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2011•Journal of Physics Conference SeriesOpen access

Large Eddy Simulations of particle-fluid interaction in a turbulent channel flow

Marek Jaszczur

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Abstract

This paper presents a comparison between results obtained using Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) in particle-laden turbulent channel flow. In the case of LES method computations were performed using the dynamic model, Smagorinski model, with and without Van Driest damping at the wall, and without sub-grid scale turbulence modelling. The focus is on the difference in the computed forces acting on a particle in the particle equation of motion. Results for turbulent flow in a channel at Re τ = 150 are presented, focusing on point-particle statistics. DNS provides a point of reference for assessing LES with different sub-filter eddy-viscosity models.

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What this paper is about

This paper presents a comparison between results obtained using Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) in particle-laden turbulent channel flow. In the case of LES method computations were performed using the dynamic model, Smagorinski model, with and without Van Driest damping at the wall, and without sub-grid scale turbulence modelling. The focus is on the difference in the computed forces acting on a particle in the particle equation of motion. Results for turbulent flow in a channel at Re τ = 150 are presented, focusing on point-particle statistics. DNS provides a point of reference for assessing LES with different sub-filter eddy-viscosity models.

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Available abstract

This paper presents a comparison between results obtained using Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) in particle-laden turbulent channel flow. In the case of LES method computations were performed using the dynamic model, Smagorinski model, with and without Van Driest damping at the wall, and without sub-grid scale turbulence modelling. The focus is on the difference in the computed forces acting on a particle in the particle equation of motion. Results for turbulent flow in a channel at Re τ = 150 are presented, focusing on point-particle statistics. DNS provides a point of reference for assessing LES with different sub-filter eddy-viscosity models.

Key concepts: Turbulence, Large eddy simulation, Mechanics, Open-channel flow, Particle-laden flows, Physics, Direct numerical simulation, Turbulence modeling

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