Secondly, mixed lubrication is a bridge between the hydrodynamic (or the elastohydrodynamic) and the boundary lubrication regimes for a system design engineer to fully understand all the links between them. Thirdly, engine lubricating oil film breakdown and wear (a durability concern) start from mixed lubrication.
Heat an oil mixture or two oils you want to test for compatibility and examine for clarity. If the mixture is cloudy, the oils are not compatible. To check further, add a small amount of water, mix thoroughly and continue heating. Allow the mixture to sit at room temperature for several hours.
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Mixed lubrication: this lubrication regime consists of a mixture of both fluid film and boundary lubrication regions. The tribological characteristics in this lubrication regime depend on the relative contribution of the fluid film and boundary lubrication.
WO-2016158615-A1 chemical patent summary.
In particular, the mixed culture was capable of growing on various n-alkanes and polycyclic aromatic hydrocarbons and was able to tolerate unusually high concentrations of waste lubricants (WEO-86.0 g/L and WTO-81.5 g/L). The initial concentration of waste lubricating oils has been varied in the range of 1-10 % (v/v).
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Mixed lubrication is an operating state (regime) of a lubricated contact in which surface roughness ( Surface Roughness) significantly affects the performance of the contact. It may occur with conformal contact lubrication, such as journal bearing lubrication. Traditionally, as suggested by the term mixed, it is thought that both hydrodynamic ...