Details

Autor(en) / Beteiligte

• Percier, Baptiste
• Manneville, Sebastien
• McElwaine, Jim N
• Morris, Stephen W
• Taberlet, Nicolas

Titel

Lift and drag forces on an inclined plow moving over a granular surface

Ist Teil von

• Physical review. E, Statistical, nonlinear, and soft matter physics, 2011-11, Vol.84 (5 Pt 1), p.051302-051302, Article 051302

Ort / Verlag

United States

Erscheinungsjahr

2011

Quelle

PROLA (Physical Review Online Archive)

Beschreibungen/Notizen

• We studied the drag and lift forces acting on an inclined plate while it is dragged on the surface of a granular media, both in experiment and in numerical simulation. In particular, we investigated the influence of the horizontal velocity of the plate and its angle of attack. We show that a steady wedge of grains is moved in front of the plow and that the lift and drag forces are proportional to the weight of this wedge. These constants of proportionality vary with the angle of attack but not (or only weakly) on the velocity. We found a universal effective friction law that accounts for the dependence on all the above-mentioned parameters. The stress and velocity fields are calculated from the numerical simulations and show the existence of a shear band under the wedge and that the pressure is nonhydrostatic. The strongest gradients in stress and shear occur at the base of the plow where the dissipation rate is therefore highest.