Settling tracer spheroids in vertical turbulent channel flows

Assessment of Turbulent Models in Computation of Strongly Curved Open Channel Flows

Several rigorous turbulent models have been developed in the past years and it can be seen that more research is needed to reach a better understanding of their generality and precision by verifying their applications for distinct hydraulic phenomena; under certain assumptions. This survey evaluates the performance of Standard k-ε, Realizable k-ε, RNG k-ε, k-ω and RSM models in predicting flow ...

Bistable flows in precessing spheroids

Precession driven flows are found in any rotating container filled with liquid, when the rotation axis itself rotates about a secondary axis that is fixed in an inertial frame of reference. Because of its relevance for planetary fluid layers, many works consider spheroidal containers, where the uniform vorticity component of the bulk flow is reliably given by the well-known equations obtained b...

Integral turbulent scales in unsteady rapidly varied open channel flows

Cascades and wall-normal fluxes in turbulent channel flows

A. Cimarelli1,2,†, E. De Angelis1,3, J. Jiménez4 and C. M. Casciola5 1DIN, Università di Bologna, 47121 Forlì, Italy 2DISMI, Università di Modena e Reggio Emilia, 42122 Reggio Emilia, Italy 3School of Engineering, Cardiff University, Queen’s Buildings, Cardiff CF24 3AA, UK 4School of Aeronautics, Universidad Politécnica de Madrid, 28040 Madrid, Spain 5DIMA, Università di Roma La Sapienza, 00185...

Collective effects in settling of spheroids under steady-state sedimentation.

We study the settling dynamics of non-Brownian prolate spheroids under steady-state sedimentation. We consider the case of moderate particle Reynolds numbers properly taking into account the hydrodynamic effects. For small volume fractions, we find an orientational transition of the spheroids, characterized by enhanced density fluctuations. Around the transition, the average settling velocity h...