The fundamentals of sliding contact melting and friction
- Duke Univ., Durham, NC (USA)
This paper focuses on the phenomenon of melting and lubrication by the sliding contact between a phase-change material and a smooth flat slider. The first part of the study considers the limit in which the melting is due primarily to direct heating, that is, to the temperature difference between the solid slider and the melting point of the phase-change material. It is shown that in this limit the relative motion gas has a uniform thickness and that the friction factor decreases as both the normal force and the temperature difference increase. The second part considers the limit where the melting is caused mainly by the frictional heating of the liquid formed in the relative motion gap. This gap turs out to have a converging-diverging shape that varies with the parameters of the problem. As the normal force increases, a larger fraction of the melt is pushed out through the upstream opening of the relative motion gap. Means for caculating the melting speed, the friction factor, and the temperature rise along the slider surface are developed.
- OSTI ID:
- 5408610
- Journal Information:
- Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 111:1; ISSN 0022-1481; ISSN JHTRA
- Country of Publication:
- United States
- Language:
- English
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