Very Interesting! Where is oil being introduced? What is surface finish on both components? Why 100PSI? Where is the 100PSI being measured? Where is the temperature measured? Is the 0.0015 inch total diametrical clearance? Is this a circulating system? What is the radial load?
And while you are taking questions.
Why is Irma coming through here?
Way to many undefined conditions. Which member is rotating? IS the assembly vertical or hoz.? None of the studies, test and engineering data, that I have read, studied will not give you the answer you seek. If,IF you were paying me to determine the answer, I would have to duplicate your device in full size and capabilities and determine the oil flow in gpm@psi graph. Starting whenever the free component centered it self and continuing until max speed you specified was obtained or the rotating member lost its stability. I would ask for possibility of using a different oils. I interested in why you specify 100psig as the required operating pressure. Viscosity chartericis of some oil solutions change as temperature and pressure changes. If it is possible to eliminate the pressure requirement and let position of the rotating component govern, all would be better. Excuse me if I have misunderstood your question.