Table 4.
Input parameters used for simulation in DEM modelling.
| Material properties | Contact parameters | ||
|---|---|---|---|
| Parameter | Value | Parameter | Value |
| Wheat bulk density (kg/m3) | 802 | Contact model | Hertz-Mindlin (no-slip) |
| Wheat Poison’s ratio | 0.32 | Wheat-wheat static friction | 0.55 |
| Wheat shear modulus (MPa) | 2.3 | Wheat-wheat rolling friction | 0.01 |
| Feeder shell density (kg/m3) | 1290 | Wheat-wheat restitution coefficient | 0.11 |
| Feeder shell Poison’s ratio | 0.47 | Wheat-wheat tangential stiffness ratio | 1.0 |
| Feeder shell shear modulus (MPa) | 2.3 | Wheat-feeder shell static friction | 0.25 |
| Cleaning brush density (kg/m3) | 1220 | Wheat-feeder shell rolling friction | 0.01 |
| Cleaning brush Poison’s ratio | 0.47 | Wheat-feeder shell restitution coefficient | 0.23 |
| Cleaning brush shear modulus (MPa) | 2.0 | Wheat-feeder shell tangential stiffness ratio | 0.8 |
| Hopper density (kg/m3) | 7810 | Wheat-cleaning brush static friction | 0.12 |
| Hopper Poison’s ratio | 0.30 | Wheat-cleaning brush rolling friction | 0.01 |
| Hopper shear modulus (MPa) | 206 | Wheat-cleaning brush restitution coefficient | 0.15 |
| Wheat-cleaning brush tangential stiffness ratio | 0.7 | ||