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What exactly is the Nusselt Number in convective heat transfer problems and are there alternatives?
Citation Link: https://doi.org/10.15480/882.1417
Publikationstyp
Journal Article
Date Issued
2016-05-20
Sprache
English
Author(s)
Institut
TORE-DOI
Journal
Citation
Entropy 18 (2016), 5: 198
Publisher DOI
Scopus ID
Publisher
Multidisciplinary Digital Publishing Institute
The often used Nusselt number is critically questioned with respect to its physical meaning. Based on a rigorous dimensional analysis, alternative assessment numbers are found that in a systematic way separately account for the quantitative and qualitative aspect of a heat transfer process. The qualitative aspect is related to the entropy generated in the temperature field of a real, irreversible heat transfer. The irreversibility can be quantified by referring it to the so-called entropic potential of the energy involved in the transfer process.
Subjects
dimensional analysis
energy devaluation
entropic potential
DDC Class
530: Physik
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entropy-18-00198-v2.pdf
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