Theoretical Analysis of Circular Stepped Plate and Step Slider Bearing Lubricated with Non Newtonian Fluids

Abstract

This thesis explores the influence of non-Newtonian fluids, such as micropolar, couplestress newlineand Rabinowitsch fluids, on the performance of circular stepped plates and stepslider newlinebearings. The study is unique in its investigation of bearing surfaces under different newlineconditions, including roughness and porosity, which significantly impact lubrication newlinebehavior. By modifying the Reynolds equation to account for surface characteristics newlinewhether porous or non-porous, rough or smooth the research provides a detailed analysis newlineof the pressure distribution within the lubricant film. This approach highlights the critical newlinerole surface topography and fluid properties play in bearing efficiency. newlineThe primary contribution of this thesis lies in addressing the challenges posed by newlineporous bearings, which typically exhibit reduced load-carrying capacity. To mitigate newlinethis issue, the work introduces a double porous model, offering a novel solution that newlineimproves both load-carrying capacity and squeezing time. This innovation significantly newlineenhances bearing performance, especially in high-precision applications where loadbearing newlinecapacity is crucial. The study further demonstrates that bearings with porous and newlinerough surfaces outperform smooth, non-porous, and non-rough surfaces in terms of loadcarrying newlinecapacity, showcasing the benefits of surface modifications in optimizing bearing newlinebehavior newline