A unified macroscopic and microscopic approach to contact conduction heat transfer

Ravi S. Prasher, Oden Alger, Patrick Phelan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

A close look at the literature on contact heat transfer reveals that the work on thermal boundary resistance (R b) arising due to the acoustic mismatch of phonons at the interface of two dissimilar materials, and thermal contact resistance (R c) arising due to incomplete contact at the interface of two materials, tends to be independent of each other, and at times there seems to be some confusion as to what is the origin of thermal contact resistance, especially at cryogenic temperatures. Since R b is present even if the interfaces are geometrically perfect, it is reasonable to expect that even in the case of imperfect interfaces, R b still plays a role in contact heat transfer. In this paper a unified model is developed, which bridges the gap between the macroscopic models based on incomplete area of contact, and the microscopic models based on acoustic mismatch in phonon transfer across the interface. A comparison between the model's predictions and cryogenic experimental data from the literature reveals that only the unified model correctly predicts the trend of the data.

Original languageEnglish (US)
Title of host publicationProceedings of the National Heat Transfer Conference
Pages1321-1326
Number of pages6
Volume2
StatePublished - 2001
Event2001 National Heat Transfer Conference (NHTC2001) - Ananheim, CA, United States
Duration: Jun 10 2001Jun 12 2001

Other

Other2001 National Heat Transfer Conference (NHTC2001)
CountryUnited States
CityAnanheim, CA
Period6/10/016/12/01

Fingerprint

Heat conduction
heat transfer
conduction
Contact resistance
contact resistance
Cryogenics
Acoustics
Dissimilar materials
acoustics
confusion
cryogenic temperature
Phonons
cryogenics
phonons
trends
predictions
Hot Temperature
Temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering (miscellaneous)

Cite this

Prasher, R. S., Alger, O., & Phelan, P. (2001). A unified macroscopic and microscopic approach to contact conduction heat transfer. In Proceedings of the National Heat Transfer Conference (Vol. 2, pp. 1321-1326)

A unified macroscopic and microscopic approach to contact conduction heat transfer. / Prasher, Ravi S.; Alger, Oden; Phelan, Patrick.

Proceedings of the National Heat Transfer Conference. Vol. 2 2001. p. 1321-1326.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Prasher, RS, Alger, O & Phelan, P 2001, A unified macroscopic and microscopic approach to contact conduction heat transfer. in Proceedings of the National Heat Transfer Conference. vol. 2, pp. 1321-1326, 2001 National Heat Transfer Conference (NHTC2001), Ananheim, CA, United States, 6/10/01.
Prasher RS, Alger O, Phelan P. A unified macroscopic and microscopic approach to contact conduction heat transfer. In Proceedings of the National Heat Transfer Conference. Vol. 2. 2001. p. 1321-1326
Prasher, Ravi S. ; Alger, Oden ; Phelan, Patrick. / A unified macroscopic and microscopic approach to contact conduction heat transfer. Proceedings of the National Heat Transfer Conference. Vol. 2 2001. pp. 1321-1326
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