Granular drag on a discrete object: shape effects on jamming.
We study the drag force on discrete objects with circular cross section moving slowly through a spherical granular medium. Variations in the geometry of the dragged object change the drag force only by a small fraction relative to shape effects in fluid drag. The drag force depends quadratically on the object's diameter as expected. We do observe, however, a deviation above the expected linear depth dependence, and the magnitude of the deviation is apparently controlled by geometrical factors.
Albert
I
I
Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA.
Sample
J G
JG
Morss
A J
AJ
Rajagopalan
S
S
Barabási
A L
AL
Schiffer
P
P