Article (Scientific journals)
Effect of an electric field on an intermittent granular flow
Mersch, Eric; Lumay, Geoffroy; Boschini, Frédéric et al.
2010In Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, 81, p. 041309
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Keywords :
granular materials; electric field; flow
Abstract :
[en] Granular gravity driven flows of glass beads have been observed in a silo with a flat bottom. A dc high electric field has been applied perpendicularly to the silo to tune the cohesion. The outlet mass flow has been measured. An image subtraction technique has been applied to visualize the flow geometry and a spatiotemporal analysis of the flow dynamics has been performed. The outlet mass flow is independent of voltage, but a transition from funnel flow to rathole flow is observed. This transition is of probabilistic nature and an intermediate situation exists between the funnel and the rathole situations. At a given voltage, two kinds of flow dynamics can occur: a continuous flow or an intermittent flow. The electric field increases the probability to observe an intermittent flow.
Research center :
GRASP
Disciplines :
Physics
Author, co-author :
Mersch, Eric ;  Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT
Lumay, Geoffroy ;  Université de Liège - ULiège > Département de physique > Physique statistique
Boschini, Frédéric ;  Université de Liège - ULiège > Département de chimie (sciences) > Plateforme APTIS
Vandewalle, Nicolas  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Language :
English
Title :
Effect of an electric field on an intermittent granular flow
Publication date :
2010
Journal title :
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
ISSN :
1539-3755
eISSN :
1550-2376
Publisher :
American Physical Society, College Park, United States - Maryland
Volume :
81
Pages :
041309
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 03 February 2011

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