Direct numerical simulation of bidisperse inertial particles settling in turbulent channel flow
نویسندگان
چکیده
The behavior of settling velocity and clustering bidisperse inertial particles in a turbulent channel flow is investigated through direct numerical simulation. particle-laden planar has friction Reynolds number at Re? = 180. Eulerian–Lagrangian method used to study the dynamic properties monodisperse with 16 different simulation sets, which are distinguished by Stokes numbers ranging from St+ 1.31 52.58 particle ratio 1:1 1:8. Momentum exchange between fluid phases considered as chosen initial volume fraction 5 × 10?5 two-way coupling regime. gravity set direction normal both wall streamwise direction. We observe that cases turbophoresis effect smaller diameter significant even though it very weak corresponding cases. use radial distribution function (RDF) investigate degree turbophoresis. results indicate RDF larger for large small greatly affected bulk ratio. Unlike clustering, terminal velocities final equilibrium state. When their fractions lower than those cases, either becomes reduced value. also relationship vortex strength. show preferential sweeping mechanism strengthened decreasing can be quantified slope curve variation
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2021
ISSN: ['1527-2435', '1089-7666', '1070-6631']
DOI: https://doi.org/10.1063/5.0035656