Determination of material functions through second sound measurements in a hyperbolic heat conduction theory
✍ Scribed by V.A. Cimelli; K. Frischmuth
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 625 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0895-7177
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✦ Synopsis
In a previous paper [I], numerical solutions to mitral-boundary value problems for a sema-empzrzcal model of heat conduction were compared with available experimental results.
In the present paper, we modify the model by introducing more realistic approximations of constltutive functions, based on measured heat conductivities and second sound speeds for NaF at low temperatures (10. 20° K). We achieve good accordance between measured second sound pulses and numerical solutions in the temperature range covered by experiments, and reasonable behaviour even beyond this interval. Especially, a passage to the diffusive regime of the classical Fourier law is possible.