A simplified model for thermal-wave cavity self-consistent measurement of thermal diffusivity

作者:Shen Jun*; Zhou Jianqin; Gu Caikang; Neill Stuart; Michaelian Kirk H; Fairbridge Craig; Astrath Nelson G C; Baesso Mauro L
来源:Review of Scientific Instruments, 2013, 84(12): 124902.
DOI:10.1063/1.4846255

摘要

A simplified theoretical model was developed for the thermal-wave cavity (TWC) technique in this study. This model takes thermal radiation into account and can be employed for absolute measurements of the thermal diffusivity of gas and liquid samples without any knowledge of geometrical and thermal parameters of the components of the TWC. Using this model and cavity-length scans, thermal diffusivities of air and distilled water were accurately and precisely measured as (2.191 +/- 0.004) x 10(-5) and (1.427 +/- 0.009) x 10(-7) m(2) s(-1), respectively, in very good agreement with accepted literature values.

  • 出版日期2013-12