Radiation
effects in the transient hot-wire technique |
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Authors: | Y Shi L Sun J E S Venart R C Prasad |
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Institution: | (1) Department of Engineering, University of New Brunswick, Saint John, Canada, NB E2L 4L5 |
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Abstract: | The transient hot-wire technique is widely used for absolute measurements
of the thermal conductivity and thermal diffusivity of fluids. It is well
established that fluid radiation effects significantly influence these measurements,
especially those for the thermal diffusivity. Corrections for radiation effects
are based on the models developed and deviations of the measured data from
the ideal line source model. In this paper, the effect of fluid radiation
on the measurements of the thermal conductivity of n-pentane
is presented. For comparison, the influence of thermal radiation effect on
measurement of transparent fluids, such as argon is also shown. The difference
between the influence of natural convection and thermal radiation is also
demonstrated. |
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Keywords: | argon hot-wire technique natural convection n-pentane thermal conductivity thermal radiation |
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