High velocity impact on a thin (non-Newtonian) fluid layer

During the high velocity impact of an object on a solid covered with thin fluid layer, lubricated contact exists within short time in which liquid is squeezed out from contact. This important for e.g. grip shoes wet surfaces. We experimentally study squeeze flow such layers and find that amount viscous dissipation determines how much remains after kinetic energy impacting absorbed. For impacts sufficient energy, it possible to completely drain Newtonian or shear thinning scale. Viscoelastic liquids, however, cannot be drained by increasing velocity, because fluids’ elastic tendency retract back into rapid squeezing. explains why presence polymeric fluids can lead extreme slipperiness Furthermore, we show all our experimental results agree predictions given hydrodynamic theory applied gap.