Reverse buoyancy in a vibrated granular bed: Computer simulations.
Eur Phys J E Soft Matter
; 35(10): 106, 2012 Oct.
Article
in En
| MEDLINE
| ID: mdl-23096151
ABSTRACT
We have performed molecular dynamics simulations of an intruder in a vibrated granular bed including interstitial fluid effects to account for the phenomenon of reverse buoyancy. We show that our model is able to reproduce the overall behaviour observed by previous experimental works and is the first finite-elements simulation to show the sinking of intruders lighter than the granular bed. To further advance our comprehension of this phenomenon, we studied the motion of the intruders in a single vibration cycle with respect to the bottom of the granular column, finding a substantial qualitative difference for heavy and light intruders and we compare these results with experiments using fine-sized glass beads. We show that, though heavy intruders seem unaffected by the force due to the fluid, the effect on light intruders is remarkable.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Vibration
/
Computer Simulation
Type of study:
Prognostic_studies
/
Qualitative_research
Language:
En
Journal:
Eur Phys J E Soft Matter
Journal subject:
BIOFISICA
Year:
2012
Document type:
Article
Affiliation country:
Venezuela