Cavitation in lubrication. Part 1. On boundary conditions and cavity—fluid interfaces

摘要: The flow of viscous lubricant in narrow gaps is considered for those geometries which cavitation arises. A detailed review presented boundary conditions have been proposed terminating the lubrication regime (i.e. valid where cavity forms). Finally it shown that a uniform cavity-fluid interface remains stable to small disturbances provided that \[ \frac{d}{dx}\left(P+\frac{T}{r}\right) < 0, \] T and r represent surface tension fluid radius curvature respectively whilst dP/dx gradient pressure immediately upstream interface.