| A | Hamaker’s constants |
| R | Equivalent radius (m) |
| F | Adhesion force (N) |
| Ff | The static friction force (N) |
| Fc | Capillary force (N) |
| Fn | The support force (N) |
| Fvdw | Van der Waals force (N) |
| G | Gravitational force (N) |
| G 1 | Horizontal component of the gravitational force (N) |
| G 2 | Vertical component of gravity (N) |
| α | Tilt angle (°) |
| M | Mass (mg) |
| ρ | Density (kg/m3) |
| θ | Surface tension of particles (N/m) |
| rms | Root means square roughness |
| γs | Surface tension at the wall (N/m) |
| γp | Wetting contact angle (°) |
| γ | Surface tension of the liquid (N/m) |
| z | Vertical distance (m) |
| g | Gravitational acceleration |
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