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- W2128974018 abstract "This paper discusses deep disconnected cavities (DDC), a concept first introduced by the author. Disconnected shallow cavities or pockets have been treated by other authors, but the consequences of the extreme depths involved with DDC have not been recognised. The introductory paper established the existence of DDC effects. The latter are partly expressible as a slightly modified Reynolds equation, in which the film thickness function refers to the local minimum rather than the local mean customary in roughness analysis. In addition, the equation involves modifying factors which are independent of film thickness and other aspects of the macro-geometry of the bearing, generating what may be interpreted as effective viscosities. The present paper establishes, by numerical studies, more exact expressions for the effective viscosities for a certain class of cavity geometry and distribution. The interaction of macro- and micro-geometry is studied, showing that the optimisation of the cavity distribution depends on the macro-geometry of the bearing. It is further shown, by a combination of analytical and numerical means, that the minimum frictional coefficient obtainable for a DDC bearing is that of its smooth counterpart when the two are running at the same minimum film thickness. If the two are lubricated by the same fluid and take the same load, a well-designed DDC bearing will have a lower coefficient of friction than a similar smooth one." @default.
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- W2128974018 date "1993-07-01" @default.
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- W2128974018 title "Characteristic effects of DDC lubrication" @default.
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- W2128974018 doi "https://doi.org/10.1002/ls.3010050405" @default.
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