RT Journal Article
T1 Confinement enhanced viscosity vs shear thinning in lubricated ice friction
A1 Baran, Lukasz
A1 González Mac-Dowell, Luis
AB The ice surface is known for presenting a very small kinetic friction coefficient, but the origin of this property remains highly controversial todate. In this work, we revisit recent computer simulations of ice sliding on atomically smooth substrates, using newly calculated bulk viscositiesfor the TIP4P/ice water model. The results show that spontaneously formed premelting films in static conditions exhibit an effective viscositythat is about twice the bulk viscosity. However, upon approaching sliding speeds in the order of m/s, the shear rate becomes very large, andthe viscosities decrease by several orders of magnitude. This shows that premelting films can act as an efficient lubrication layer despite theirsmall thickness and illustrates an interesting interplay between confinement enhanced viscosities and shear thinning. Our results suggest thatthe strongly thinned viscosities that operate under the high speed skating regime could largely reduce the amount of frictional heating.
PB American Institute of Physics
SN 0021-9606
YR 2024
FD 2024-02-06
LK https://hdl.handle.net/20.500.14352/102554
UL https://hdl.handle.net/20.500.14352/102554
LA eng
NO Łukasz Baran, Luis G. MacDowell; Confinement enhanced viscosity vs shear thinning in lubricated ice friction. J. Chem. Phys. 7 February 2024; 160 (5): 056101.
NO Agencia Estatal de Investigación
DS Docta Complutense
RD 9 abr 2025