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Abstract
A discussion is presented concerning the choice of boundary conditions to be used in converging-diverging lubrication films. It is concluded that, although no unique solution exists, under usual lubrication conditions (film rupture), the well-known condition dp/dx = 0 seems to hold indeed true, on the physical ground that this condition corresponds to a maximum accumulated mechanical energy from the moving surface via friction stresses.
The calculation of pressure distributions and operating characteristics of infinitely long journal bearings, for laminar and turbulent flow, including the effects of inertia, is then presented in light of the discussion of boundary conditions. The effects of inertia forces in full journal bearings were found to be small, except for large Reynolds numbers. The effects are diminished as the eccentricity ratio is increased, and the principal effect is an increase in the attitude angle.
Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in Minneapolis, Minnesota, October 24–26, 1978
Notes
Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference in Minneapolis, Minnesota, October 24–26, 1978