Sliding friction on wet and dry sand - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2014

Sliding friction on wet and dry sand


We show experimentally that the sliding friction on sand is greatly reduced by the addition of some—but not too much—water. The formation of capillary water bridges increases the shear modulus of the sand, which facilitates the sliding. Too much water, on the other hand, makes the capillary bridges coalesce, resulting in a decrease of the modulus; in this case, we observe that the friction coefficient increases again. Our results, therefore, show that the friction coefficient is directly related to the shear modulus; this has important repercussions for the transport of granular materials. In addition, the polydispersity of the sand is shown to also have a large effect on the friction coefficient. DOI:

Dates et versions

hal-01157334 , version 1 (27-05-2015)



Abdoulaye Fall, B. Weber, M. Pakpour, N. Lenoir, N. Shahidzadeh, et al.. Sliding friction on wet and dry sand. Physical Review Letters, 2014, 112 (17), pp.175502. ⟨10.1103/PhysRevLett.112.175502⟩. ⟨hal-01157334⟩
319 Consultations
0 Téléchargements



Gmail Facebook Twitter LinkedIn More