Model diameter (mm) | Minimum particle radius (mm) | Ratio between the maximum and minimum particle radius
| Normal stiffness coefficient
| Internal stress (MPa) | Minimum number of free particles
| Percentage of free particles | Particle density ρ (kg/m3) | Connection modulus between particles (GPa) | Ratio between normal and tangential stiffness
| Friction factor between particles
| Average of normal connection strength (MPa) | Standard deviation of normal connection strength (MPa) | Average of tangential connection strength (MPa) | Standard deviation of tangential connection strength (MPa) |