ISSN:
1572-9567
Keywords:
finite pulse time effect
;
flash method
;
thermal diffusivity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract After a brief review of the finite pulse time effects in flash thermal diffusivity measurements, an analytical expression for an exponential shape pulse was determined using the Green function method. The results were compared with those obtained by Larson and Koyama. It was found that, using the Larson and Koyama equation, when the dimensionless time ω is equal to zero, the dimensionless temperature rise V cannot reach zero, and when ωp, the time characterizing the dimensionless pulse, approaches 1/n 2 (n=1,2,3,...), a large error of ω1/2 will result. These contradictions have been resolved by the present work. In other respects, both sets of results concurred. The results are compared with the triangular pulse and are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00522666
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