...Andreas Almqvist; John Fabricius; Andrew Spencer; Peter Wall Different averaging techniques have proved to be useful for analyzing the effects of surface roughness in hydrodynamic lubrication. This paper compares two of these averaging techniques, namely the flow factor method by Patir and Cheng (P...

... in the continuum regime. Subsequently, pressure and shear flow factors are obtained by evaluating the velocity field in accordance with the extended Reynolds equation of Patir and Cheng ( 1978, ASME J. Tribol., 100, pp. 12–17 ). The approach allows an efficient determination of the hydrodynamic characteristics...

...Sum Huan Ng; C. Fred Higgs,, III; Inho Yoon; Steven Danyluk Pressure and shear flow factors (Patir and Cheng, 1978) were used to take into account the roughness of the pad surface in the modeling of the interfacial fluid pressure during chemical mechanical polishing. An attempt was made to explain...