Evolution of the age-included nearest pair distribution in disperse multiphase flows
نویسندگان
چکیده
The age of the nearest particle pair is introduced as difference between current time and most recent when was formed. evolution equation for age-included distribution function derived. With assumption random destruction pairs, predicts exponential probability ages pairs. Particle-resolved numerical simulations with moving particles are performed to verify this prediction. then used derive particle–fluid–particle (PFP) stress, which known be related hyperbolicity two-fluid equations. It found that relaxation also PFP stress. Guided by closure terms in stress equation, we study kinematics pairs particle-resolved flows caused sedimentation initially isotropic homogeneous distributions. At steady states, Reynolds numbers around 20. Anisotropy inhomogeneity distributions seen develop these flows. mean distances Voronoi cell volumes studied. We closely changes inter-particle scale quantities.
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2023
ISSN: ['1527-2435', '1089-7666', '1070-6631']
DOI: https://doi.org/10.1063/5.0147347