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On the squeeze film characteristics between a long cylinder and a flat plate: Rabinowitsch model

In practice, lubricants’ stability is improved by blending different additives (viscosity index improvers) such as polyisobutylene, ethylene–propylene, lithium hydroxy stearate and hydrophobic silica. Due to the additives, the lubricants exhibit non-Newtonian pseudoplastic and dilatant nature, which can be described by Rabinowitsch fluid model. In the present analysis, the squeezing characteristics between a long cylinder and a flat plate, lubricated with non-Newtonian pseudoplastic and dilatant lubricants, have been investigated. The modified Reynolds equation has been derived in the analysis and the close form solution for film pressure is obtained. The results for the pressure distribution, load-carrying capacity and time–height relationship under squeezing characteristics have been calculated numerically for various values of pseudoplastic parameter (i.e. different values of viscosity index improver). The effect of cavitation is also analyzed in the analysis. It is concluded that these characteristics show significant variation with the non-Newtonian pseudoplastic and dilatant behavior of the fluids.