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Dry granular avalanche impact force on a rigid wall: Analytic shock solution versus discrete element simulations
Adel Albaba1, Stéphane Lambert2, Thierry Faug2
1University of Grenoble Alpes, Irstea, UR ETGR, 2 rue de la Papeterie-BP 76, F-38402 St-Martin-d'Hères, France and Berne University of Applied Sciences, School of Agricultural, Forest and Food Science HAFL, Länggasse 85, CH-3052 Zollikofen, Switzerland.
Physical Review. E
|June 17, 2018
Summary
This study models granular flow impacting a wall using discrete element method (DEM) simulations and an analytic shock wave solution. The analytic model reasonably reproduces DEM results for impact forces and dead-zone dynamics.
Area of Science:
- Physics
- Engineering
Background:
- Granular flows on inclines present complex dynamics.
- Understanding impact forces is crucial for predicting structural responses.
Purpose of the Study:
- To investigate the mean impact force of granular flow on a rigid wall.
- To compare numerical simulations with an analytic shock wave model.
Main Methods:
- Numerical simulations using the discrete element method (DEM) to model granular flow-wall interaction.
- Development of a depth-averaged analytic solution based on compressible shock wave theory.
Main Results:
- DEM simulations computed flow quantities and impact forces.
- The analytic solution reasonably reproduced DEM-calculated dead-zone dynamics and mean wall forces.
- The assumption of a singular shock wave surface was questioned due to finite wave length.
Conclusions:
- The analytic model provides a reasonable approximation for granular flow impact forces.
- Further investigation into the properties and structure of granular waves is needed.
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