Evaluation of steady-periodic heat flow method for measuring the thermal diffusivity of materials with temperature-dependent properties

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TypeArticle
Journal titleNBS Special Publication
ISSN0083-1883
Issue302
Pages219228; # of pages: 10
Subjectheat transfer; diffusivity; thermal properties; materials; dry materials; infinite slabs; moist materials; periodic heat flow; temperature dependence; thermal conductivity; thermal diffusivity
AbstractTemperatures in a material with temperature-dependent properties were calculated by finite difference methods. The calculated values were analyzed for harmonic content and used with the solution to the linear form of the heat conduction equations to determine the mean value of thermal diffusivity. Errors in determining the mean properties were calculated and the distortion produced by the temperature dependence was tabulated. Distortion of the temperature waves in the material places limitations on the use of the method for moist materials. The main harmonic content was found to have little distortion so long as only odd harmonics were present in the boundary conditions. Accuracy of the method was established for the configuration and range of parameters anticipated for moist building materials.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-397
NRC number10679
2523
NPARC number20374690
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Record identifierc8e980b8-0412-4d33-bda6-e302641538a1
Record created2012-07-23
Record modified2016-05-09
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