Coefficients Used in a New Transition Reynolds Equation Model Available to Purchase

This paper presents a numerical investigation of the coefficients used in the transition Reynolds equation model [1], which is applicable to the transition flow of thin films in long journal bearings. Calculations show that the overall coefficient A₁(Re_h) increases with the increase of Reynolds number, while the other overall coefficient A₂(Re_h) decreases with the increase of Reynolds number. A₁(Re_h) is always positive and A₂(Re_h) is always negative. The magnitude of both A₁(Re_h) and A₂(Re_h) is larger for the larger clearance ratio C/R at the same Reynolds number. The curves of A₁(Re_h) or A₂(Re_h) for different clearance ratios tend to collapse to one when Taylor number is used as the abscissa, particularly when Taylor number is less than 70. With these coefficients determined the model presented in [1] is fully usable.