Effective thermal conductivity of a thin composite material

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Description

The thermal conductivity of a randomly oriented composite material is modeled using a probabilistic approach in order to determine if a size effect exists for the thermal conductivity at small composite thickness. The numerical scheme employs a random number generator to position the filler elements, which have a relatively high thermal conductivity, within a matrix having a relatively low thermal conductivity. Results indicate that, below some threshold thickness, the composite thermal conductivity increases with decreasing thickness, while above the threshold the thermal conductivity is independent of thickness. The threshold thickness increases for increasing filler fraction and increasing k{sub f}/k{sub m}, ... continued below

Physical Description

11 p.

Creation Information

Phelan, P. E. & Niemann, R. C. December 1996.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

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  • Phelan, P. E. Arizona State Univ., Tempe, AZ (United States). Dept. of Mechanical and Aerospace Engineering
  • Niemann, R. C. Argonne National Lab., IL (United States)

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Description

The thermal conductivity of a randomly oriented composite material is modeled using a probabilistic approach in order to determine if a size effect exists for the thermal conductivity at small composite thickness. The numerical scheme employs a random number generator to position the filler elements, which have a relatively high thermal conductivity, within a matrix having a relatively low thermal conductivity. Results indicate that, below some threshold thickness, the composite thermal conductivity increases with decreasing thickness, while above the threshold the thermal conductivity is independent of thickness. The threshold thickness increases for increasing filler fraction and increasing k{sub f}/k{sub m}, the ratio between filler and matrix thermal conductivities.

Physical Description

11 p.

Notes

OSTI as DE97003873

Source

  • ICHMT symposium on molecular and microscale heat transfer in materials processing and other applications, Yokohama (Japan), 1-5 Dec 1996

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  • Other: DE97003873
  • Report No.: ANL/ET/CP--90218
  • Report No.: CONF-961264--1
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 468493
  • Archival Resource Key: ark:/67531/metadc674706

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Creation Date

  • December 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • Nov. 17, 2015, 1:22 p.m.

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Phelan, P. E. & Niemann, R. C. Effective thermal conductivity of a thin composite material, article, December 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc674706/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.