A Lagrangian probability-density-function model for turbulent particle-laden channel flow in the dense regime
نویسندگان
چکیده
Modeling particle-laden turbulent flows at high volume fractions requires accounting for the coupling between phases. The latter is often a sensitive point, and proper closure of exchange production terms due to presence particles not straightforward. In present work, Lagrangian probability-density-function model developed homogeneous cluster-induced turbulence extended channel flow. key features are consistent two-way decomposition particle velocity into spatially correlated uncorrelated components, which crucial dense allows dealing with collisions from statistical point view. A numerical scheme coupled solution stochastic differential equations Reynolds-stress fluid developed. Tests tracer without done assess validity consistency scheme. Finally, two sets simulations different diameters in flow shear Reynolds R e ? = 300 reported. effect by varying mass loading dispersed phase mass-loading range ? 0–2 analyzed, results compared previous Eulerian–Lagrangian Eulerian–Eulerian direct-numerical simulation (DNS) studies. Mean velocities kinetic energy show good agreement DNS, especially regarding trend respect loading. Consistent prior increased causes drastic reduction 0–2.
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2021
ISSN: ['1527-2435', '1089-7666', '1070-6631']
DOI: https://doi.org/10.1063/5.0045690