On stratification control of the velocity fluctuations in sedimentation

Daniel Chehata Gomez (1) , Laurence Bergougnoux (1) , E. John Hinch (2) , Elisabeth Guazzelli (1)

1 IUSTI - Institut universitaire des systèmes thermiques industriels
2 DAMTP - Department of Applied Mathematics and Theoretical Physics

We have tested whether stratification can govern local velocity fluctuations in suspensions of sedimenting spheres. Comparison of the proposed scaling for local control of fluctuations by stratification to experimental data demonstrates that this mechanism cannot account for the reduction of the observed velocity fluctuations.

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

Daniel Chehata Gomez, Laurence Bergougnoux, E. John Hinch, Elisabeth Guazzelli. On stratification control of the velocity fluctuations in sedimentation. Physics of Fluids, 2007, 19, pp.098102. ⟨10.1063/1.2772902⟩. ⟨hal-01067004⟩