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Published on: September 4, 2013
Pattern formation during air injection into granular materials confined in a circular Hele-Shaw cell
O Johnsen1, R Toussaint, K J Måløy
1Department of Physics, University of Oslo, P.O. Box 1048 Blindern, 0316 Oslo, Norway.
Summary
This study explores granular material dynamics in a radial Hele-Shaw cell using air injection. Researchers identified distinct hydrodynamic regimes and pattern formation, validating experimental and numerical findings.
Area of Science:
- Physics
- Fluid Dynamics
- Materials Science
Background:
- Granular materials exhibit complex behaviors when subjected to fluid flow.
- Hele-Shaw cells are used to study fluid dynamics and pattern formation in confined systems.
Purpose of the Study:
- To investigate the dynamics of granular materials in a radial Hele-Shaw cell during central air injection.
- To characterize pattern formation and hydrodynamic regimes as a function of injection pressure.
Main Methods:
- Experimental investigation of granular material behavior.
- Numerical modeling of fluid-granular and solid-solid interactions.
- Classification of hydrodynamic regimes based on injection pressure.
Main Results:
- Observed and reproduced distinct hydrodynamic regimes.
- Characterized pattern formation, including fingering and compacting dynamics.
- Validated numerical model against experimental observations.
Conclusions:
- The study successfully models and characterizes granular material dynamics under air injection in a radial Hele-Shaw cell.
- Experimental and numerical results show good agreement, confirming the identified hydrodynamic regimes and dynamic features.
