Large-eddy simulation of a particle-laden turbulent channel flow


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Vreman, A.W. and Geurts, B.J. and Deen, N.G. and Kuipers, J.A.M. (2003) Large-eddy simulation of a particle-laden turbulent channel flow. In: 5th International ERCOFTAC Workshop Direct and Large-Eddy Simulation V, August 27-29, 2003, Munich, Germany.

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Abstract: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.
Item Type:Conference or Workshop Item
Copyright:© 2003 Springer
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/41078
Official URL:http://dx.doi.org/10.1007/978-1-4020-2313-2_29
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