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Origin of Stability in SedimentationVelocity fluctuations and particle concentrations are studied in a liquid fluidized bed to investigate the origin of steady state sedimentation. Both the velocity fluctuations and the particle concentrations are found to strongly depend on height. A flux balance model shows why the bed is stable: velocity fluctuations drive a downward particle flux that is compensated by an upward particle flux stemming from an excess flow velocity due to the stratification in concentration. Our results show that in steady state the magnitudes of the fluctuations are related to the degree of stratification.
Document ID
20040000689
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Segre, P. N. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Fluid Mechanics And Thermodynamics
Meeting Information
Meeting: Division of Fluid Dynamics 56th Annual Meeting
Location: Rutherford, NJ
Country: United States
Start Date: September 23, 2003
End Date: September 25, 2003
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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