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Enhanced Transient Hot Bridge Method Using a Finite Element Analysis

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Abstract

This paper presents a new enhanced measuring procedure to determine the direction-dependent thermal diffusivity of anisotropic materials using the transient hot bridge technique. Two measurements with different sensor orientation are performed to ascertain the thermal diffusivities in the three spatial directions. The analysis of the measurement signals combines an analytical evaluation with a finite-element post-diction of the signal. The measurement uncertainty is assessed to 4 %–10 %.

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Acknowledgements

This research was supported by the German Federal Ministry of Education and Research, research Grant (13FH009PX5).

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Applied Sciences Karlsruhe, Karlsruhe, Germany

    J. Gaiser & M. Stripf

  2. Institute of Vehicle System Technology, Karlsruhe Institute of Technology, Karlsruhe, Germany

    F. Henning

Authors
  1. J. Gaiser
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  2. M. Stripf
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  3. F. Henning
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Correspondence to J. Gaiser.

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Gaiser, J., Stripf, M. & Henning, F. Enhanced Transient Hot Bridge Method Using a Finite Element Analysis. Int J Thermophys 40, 12 (2019). https://doi.org/10.1007/s10765-018-2476-y

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  • DOI: https://doi.org/10.1007/s10765-018-2476-y

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