Convection rolls in a rotating box filled with beads

Thumbnail Image
Files
Rietz_high_quality_mpeg2.mpg (150.33 MB)
Rietz_low_quality_mpeg1.mpg (9.71 MB)
No Access Until
Permanent Link(s)
https://hdl.handle.net/1813/14105
Collections
Fluid Dynamics Videos
Other Titles
Authors
Abstract
Fill a box partially with a dry mixture of beads and rotate it slowly. As it is known from granular physics segregation patterns appear. Now put in more beads so that the box is almost completely filled and the beads can't move freely. Do we expect something unusual? Basically, only the quantity of beads was changed in the experiment but the results of that modification are clearly visible. Convection rolls are now observed that possess the same phenomenology as rolls in liquids or shaken granulates. The answer of that could not be easily defined and explained as in the cases of instable liquids that have a gradient (i.e. in density or temperature) or shaken systems that are strongly agitated. Besides the simplicity of the experiment known mechanisms for granular convection could not be applied.
Journal / Series
Volume & Issue
Description
Sponsorship
Date Issued
2009-10-17T00:42:56Z
Publisher
Keywords
convection rolls; segregation
Location
Effective Date
Expiration Date
Sector
Employer
Union
Union Local
NAICS
Number of Workers
Committee Chair
Committee Co-Chair
Committee Member
Degree Discipline
Degree Name
Degree Level
Related Version
Related DOI
Related To
Related Part
Based on Related Item
Has Other Format(s)
Part of Related Item
Related To
Related Publication(s)
Link(s) to Related Publication(s)
References
Link(s) to Reference(s)
Previously Published As
Government Document
ISBN
ISMN
ISSN
Other Identifiers
Rights
Rights URI
Types
Accessibility Feature
Accessibility Hazard
Accessibility Summary
Link(s) to Catalog Record