@ARTICLE{Wolff_Andrzej_Numerical_2005,
 author={Wolff, Andrzej and Piechna, Janusz},
 volume={vol. 52},
 number={No 2},
 journal={Archive of Mechanical Engineering},
 pages={157-190},
 howpublished={online},
 year={2005},
 publisher={Polish Academy of Sciences, Committee on Machine Building},
 abstract={The motion of a ring pack on a thin oil film covering a cylinder liner has been analysed. In contrast to the previous paper [8], which considered only hydrodynamic phenomena, in the present paper a mixed lubrication case is also taken into account. Equations describing the mixed lubrication problem based on the empirical mathematical model formulated in works of Patir, Cheng [5], [6] and Greenwood, Trip [2] have been combined and used in this paper. Results of numerical simulations of this phenomenon have been presented. The model of ring motion considered takes the following phenomena into account: hydrodynamic and contact forces, spring and gas forces and the local motion of each ring in piston grooves. Differences between the motion of the ring on a thick and thin oil film are analysed and discussed.},
 type={Article},
 title={Numerical simulation of piston ring pack operation in the case of mixed lubrication},
 URL={http://journals.pan.pl/Content/124971/PDF/6_MECHANICAL_52_2005_2_Wolff_Numerical.pdf},
 keywords={hydrodynamics, gasdynamics, oil consumption, elastic contact, surface roughness, pistonengines},
}