Antonyuk, SergiySergiyAntonyukHeinrich, StefanStefanHeinrichDosta, MaksymMaksymDosta2022-10-102022-10-102009-076th International Conference on Micromechanics of Granular Media, Powders and Grains (2009)http://hdl.handle.net/11420/13733The influence of the thickness (40 um - 1 mm) and the viscosity (1-300 mPa-s) of the liquid layer at the contact as well as impact velocity (1-2.4 m/s) on the energy dissipation during the normal impact of spherical granules was investigated. Using a free-fall device the restitution coefficients of γ-Al2O3 granules impacted on a steel wall with a liquid layer were measured. With increasing liquid viscosity the restitution coefficient and the critical thickness of liquid layer at which the granule sticks decreased. With decreasing impact velocity the restitution coefficient greatly decreases. A rational explanation of obtained effects was given by results of numerically solved force and energy balances.en0094-243X2009796799Energy dissipationGranule impactLiquid bridgeLiquid layerRestitution coefficientConference Paper10.1063/1.3180048Conference Paper