Abstract
Large-Eddy Simulation (LES) and Discrete Particle Simulation (DPS) are used to highlight effects of fluid-particle and particle-particle interactions on dispersed-phase transport in fully-developed turbulent channel flow. A range of particle Stokes numbers in the simulations are considered that lead to strong changes in particle response. In the absence of inter-particle collisions, the calculations illustrate the characteristic build-up of particles in the near-wall region. While mean shear in the carrier and dispersed phase velocities is an important effect in wall-bounded flows, LES/DPS results show that the particle velocity fluctuations in the wall-normal direction are controlled primarily by the drag force and in equilibrium with the corresponding components of the fluid-particle velocity correlation. Inter-particle collisions provide a redistribution mechanism that reduces the strong anisotropy of the particle velocity fluctuations and substantially elevates cross-stream transport. Spatial properties of the particle velocity field are examined using two-point correlations. The correlation functions are discontinuous at the origin and are consistent with a partitioning of the particle velocity by inertia into a spatially-correlated contribution and random component that is not correlated in space. Perspectives and implications of these findings are also discussed.
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References
Caraman, N., Borée, J. and Simonin, O., 2003, Physics of Fluids 15, 3602–3612.
Fevrier, P., Simonin, O. and Squires, K.D., 2005, Journal of Fluid Mechanics 533, 1–46.
Khalitov, D.A. and Longmire, E.K., 2003, Effect of particle size on velocity correlations in turbulent channel flow, FEDSM03-45730.
Rouson, D.W.I. and Eaton, J.K., 2001, Journal of Fluid Mechanics 424, 149–169.
Schiller, L. and Nauman, A., 1935, V.D.I. Zeitung 77, 318–320.
McLaughlin, J.B., 1989, Physics of Fluids 1, 1211–1224.
Marchioli, C. and Soldati, A., 2002, Journal of Fluid Mechanics 468, 283–315.
Vance, M.W. and Squires, K.D., 2002, An approach to parallel computing in an Eulerian-Lagrangian two-phase flow model, FEDSM 2002-31225.
Wang, Q. and Squires, K.D., 1996, Physics of Fluids 8, 1207–1223.
Yamamoto, Y., Potthoff, M., Tanaka, T. and Tsuji, Y., 2001, Journal of Fluid Mechanics 442, 303–334.
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Squires, K.D., Simonin, O. (2006). On Fluid-Particle and Particle-Particle Interactons in Gas-Solid Turbulent Channel Flow. In: Balachandar, S., Prosperetti, A. (eds) IUTAM Symposium on Computational Approaches to Multiphase Flow. Fluid Mechanics and Its Applications, vol 81. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4977-3_2
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DOI: https://doi.org/10.1007/1-4020-4977-3_2
Publisher Name: Springer, Dordrecht
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