An instability model is proposed to describe the process of separating a sphere from a flat in the presence of a lubricant. The model is based on consideration of the effects of sphere inertia in characterizing the critical point of separation — namely, that there is a sudden onset of significant sphere acceleration. Good agreement is found between the predictions of the instability model with those of a full numerical simulation. The instability model provides an improvement over an “impulse” model found in the literature, which is unable to predict the point of separation.
- Tribology Division
Analytical Instability Model for the Separation of a Sphere From a Flat in the Presence of a Liquid Film
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Streator, JL. "Analytical Instability Model for the Separation of a Sphere From a Flat in the Presence of a Liquid Film." Proceedings of the ASME/STLE 2004 International Joint Tribology Conference. ASME/STLE 2004 International Joint Tribology Conference, Parts A and B. Long Beach, California, USA. October 24–27, 2004. pp. 1217-1224. ASME. https://doi.org/10.1115/TRIB2004-64106
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