Abstract
Near the end of the 19th century, H. A. Janssen discovered that the floor pressure in a container of granular material asymptotes exponentially to a value less than the weight of the material, i.e., the pressure becomes independent of the fill height of the column. This phenomenon is investigated using discrete element simulations of inelastic, frictional spheres in a cylindrical vessel having a particle-to-cylinder diameter ratio of approximately 13.3. We compute the load experienced by a piston that is slowly displaced downward at a rate of 0.001 diameters per second for several values of the wall friction coefficient. Our simulated behavior of the load vs. fill level was found to fit well with the functional form of Janssen's theory. Quantitative differences with experimental measurements and possible reasons are discussed.
| Original language | English (US) |
|---|---|
| State | Published - 2006 |
| Event | 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology - Orlando, FL, United States Duration: Apr 23 2006 → Apr 27 2006 |
Other
| Other | 2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology |
|---|---|
| Country/Territory | United States |
| City | Orlando, FL |
| Period | 4/23/06 → 4/27/06 |
All Science Journal Classification (ASJC) codes
- General Chemical Engineering
- General Chemistry
Keywords
- Discrete element simulation
- Discrete element simulations
- Granular materials
- Janssen model