Journal
TRIBOLOGY INTERNATIONAL
Volume 93, Issue -, Pages 429-445Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2015.08.040
Keywords
Cavitation; Rayleigh-Plesset equation; Reynolds equation; Journal Bearing
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This study presents a physics-based cavitation model solving the coupled Rayleigh-Plesset (RP) and Reynolds (RE) equations in a fully transient environment. Inclusion of the surface dilatational viscosity within the interfacial stress balance of a dynamically growing bubble is discussed at length and detailed physical insight into its mechanism adds significantly to the existing body of literature. A parametric study establishes the importance of the surface dilatational viscosity and values on the order of 10(-2) to 10(-4) [N s/m] are shown to establish upper and lower bounds on tensile stresses producing the full and half-Sommerfeld-like solutions respectively. Interactions between rotational speed and eccentricity ratio are elucidated with the overall effect of increasing surface dilatational viscosity shown to be de-stabilizing. (C) 2015 Published by Elsevier Ltd.
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