Fluctuations in inertial dense homogeneous suspensions

Elise Alméras (1) , Olivier Masbernat (2) , Frédéric Risso (3) , Rodney O. Fox (4)

1 FERMAT - Fédération de Recherche Fluides, Energie, Réacteurs, Matériaux et Transferts
2 LGC - Laboratoire de Génie Chimique
3 IMFT - Institut de mécanique des fluides de Toulouse
4 ISU - Iowa State University

A theoretical model of liquid and particle random fluctuations is proposed for gravity-driven flows of inertial homogeneous suspensions. It is based on a paradigm assuming that fluctuations of both liquid velocity and particle slip velocity are driven by fluctuations of the phase indicator function. It is shown that this model accurately predicts the energy of the fluctuations of both the fluid and particle phases measured in a homogeneous solid-liquid fluidized bed over a wide range of particle volume fractions, from 10% to 45%

Mots clés: Homogeneous suspensions; Fluctuations inertial

Domaines: Génie chimique; Génie des procédés; Mécanique des fluides [physics.class-ph]

Elise Alméras, Olivier Masbernat, Frédéric Risso, Rodney O. Fox. Fluctuations in inertial dense homogeneous suspensions. Physical Review Fluids, 2019, 4 (10), pp.0. ⟨10.1103/PhysRevFluids.4.102301⟩. ⟨hal-02318688⟩