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Squeeze film characteristics of conical bearings operating with non-Newtonian lubricants ‐ Rabinowitsch fluid model

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Purpose ‐ The purpose of this paper is to present a theoretical study of non-Newtonian effects in conical squeeze-film plates that is based on the Rabinowitsch fluid model. Design/methodology/approach ‐ A non-linear, modified Reynolds equation accounting for the non-Newtonian properties following the cubic stress law equation is derived. Through a small perturbation method, first-order closed-form solutions are obtained. Findings ‐ It is found that the non-Newtonian properties of dilatant fluids increase the load capacity and lengthen the response time as compared to the case using a Newtonian lubricant; however, the non-Newtonian behaviors of pseudoplastic lubricants result in reverse influences. Originality/value ‐ Numerical tables for squeeze-film loads of conical plates are also provided for engineering applications.
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Keywords: Conical plates; Dilatant fluids; Pseudoplastic lubricants; Rabinowitsch fluid model; Squeeze films

Document Type: Research Article

Publication date: April 8, 2014

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