Research Article Squeeze Film Lubrication between Rough Poroelastic Rectangular Plates withMicropolar Fluid: A Special Reference to the Study of Synovial Joint Lubrication

Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. e effects of surface roughness and poroelasticity on the micropolar squeeze �lm behavior between rectangular plates in general and that of synovial joints in particular are presented in this paper. e modi�ed Reynolds equation, which incorporates the randomized surface roughness structure as well as elastic nature of articular cartilage with micropolar �uid as lubricant, is derived. e load-carrying capacity and time of approach as functions of �lm thickness during normal articulation of joints are obtained by using Christensen stochastic theory for rough surfaces with the assumption that the roughness asperity heights are to be small compared to the �lm thickness. It is observed that the effect of surface roughness has considerable effects on lubricationmechanism of synovial joints. 1