Multiscale analysis of moving clusters of microcontacts

Yong Hoon Jang, J. R. Barber

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Greenwood's approximation for the thermal resistance of a cluster of microcontacts is used recursively to estimate the thermal resistance due to a fractal array of circular contact areas motivated by Archard's contact model. The results are then extended to the case of sliding contacts, using a technique due to Burton. It is found that the total resistance converges on a limit when arbitrarily large numbers of fractal scales are included, but the fine scale features in the contact area have a disproportionate effect at high Peclet number and hence reduce the proportion of frictional heating passing into the moving body.

Original languageEnglish
Pages (from-to)3817-3822
Number of pages6
JournalInternational Journal of Heat and Mass Transfer
Volume53
Issue number19-20
DOIs
Publication statusPublished - 2010 Sep 1

Fingerprint

thermal resistance
Heat resistance
Fractals
fractals
sliding contact
Peclet number
proportion
Heating
heating
estimates
approximation

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

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Multiscale analysis of moving clusters of microcontacts. / Jang, Yong Hoon; Barber, J. R.

In: International Journal of Heat and Mass Transfer, Vol. 53, No. 19-20, 01.09.2010, p. 3817-3822.

Research output: Contribution to journalArticle

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AB - Greenwood's approximation for the thermal resistance of a cluster of microcontacts is used recursively to estimate the thermal resistance due to a fractal array of circular contact areas motivated by Archard's contact model. The results are then extended to the case of sliding contacts, using a technique due to Burton. It is found that the total resistance converges on a limit when arbitrarily large numbers of fractal scales are included, but the fine scale features in the contact area have a disproportionate effect at high Peclet number and hence reduce the proportion of frictional heating passing into the moving body.

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