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- W2172173619 abstract "Turbulence modulation in rotating channel flows due to small solid particles, at low particle volume fractions O(10−5), is studied using direct numerical simulation (DNS). It is found, for the larger and heavier particles in a rotating channel, that the consideration of inter-particle collisions in the modeling yields higher turbulence kinetic energy as compared to the one without consideration of the inter-particle collisions. From the present DNS results, it is shown that, the inter-particle collisions enhance the fluid turbulence energy in the central region mainly at low wavenumbers; the inter-particle collisions enhance the fluid turbulence energy in the near-wall regions in the whole spectral band. The 70μm copper particles have a positive contribution in the vicinity of the pressure surface and a negative contribution a little far from it to u2 and v2, while a negative contribution to uv in the vicinity of the pressure surface. The dissipation and viscous diffusion are changed consequently in this area. When the inter-particle collisions have not been considered, the magnitudes of the peaks of terms in balance of the Reynolds stress equations are much damped near the pressure surface and their positions are moved away from the wall, and there is almost no gain or loss near the suction surface compared with the corresponding case considering the inter-particle collisions. Production term G12 due to system rotation plays an important role in the uv equation, especially for the cases not considering the inter-particle collisions." @default.
- W2172173619 created "2016-06-24" @default.
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- W2172173619 date "2002-04-01" @default.
- W2172173619 modified "2023-10-18" @default.
- W2172173619 title "Turbulence modulation by dispersed solid particles in rotating channel flows" @default.
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- W2172173619 doi "https://doi.org/10.1016/s0301-9322(01)00084-2" @default.
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