Dynamic Self-Organization in Particle-Laden Turbulent Channel Flow


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Geurts, B.J. and Vreman, A.W. (2005) Dynamic Self-Organization in Particle-Laden Turbulent Channel Flow. In: Engineering Turbulence Modelling and Experiments 6. Elsevier, pp. 979-988. ISBN 9780080445441

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Abstract:We study fundamental aspects of turbulent riser-flow which contains large numbers of interacting particles. We include particle-particle as well as particle-fluid interactions. These interactions and the flow-forcing are the source for the dynamic formation and destruction of large-scale coherent particle swarms in the flow. We establish the basic scenario of this self-organization and investigate the dominant aspects of the resulting turbulence modulation. Large-eddy simulations with different subgrid models, and large numbers of particles at a significant volume fraction and realistic mass load ratio, indicate the development of a thinner boundary layer and an accumulation of particles near the walls. At an average volume fraction of ≈ 1.5% it was found that neglecting particleparticle interactions leads to an unphysical modulated flow.
Item Type:Book Section
Copyright:© 2005 Elsevier
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/77648
Official URL:http://dx.doi.org/10.1016/B978-008044544-1/50094-7
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