Internal convective heat transfer to gases in the low-Reynolds-number “turbulent” range

McEligot, Donald M.; Chu, Xu; Skifton, Richard S.; Laurien, Eckart

doi:10.1016/j.ijheatmasstransfer.2017.12.086

Title: Internal convective heat transfer to gases in the low-Reynolds-number “turbulent” range

Journal Article · Wed Mar 07 04:00:00 UTC 2018 · International Journal of Heat and Mass Transfer

DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.086 · OSTI ID:1434302

McEligot, Donald M. ^[1]; Chu, Xu ^[2]; Skifton, Richard S. ^[3]; Laurien, Eckart ^[4]

University of Idaho, Idaho Falls, ID (United States); Idaho National Laboratory (INL), Idaho Falls, ID (United States); Institut fur Kernenergetik und Energiesysteme, Stuttgart/Vaihingen (Germany)
Institut fur Kernenergetik und Energiesysteme, Stuttgart/Vaihingen (Germany); Institut fur Thermodynamik der Luft- und Raumfahrt, Stuttgart/Vaihingen (Germany)
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Institut fur Kernenergetik und Energiesysteme, Stuttgart/Vaihingen (Germany)

For internal vertical gas flow in tubes with strong heating rates at low turbulent Reynolds numbers, a typical experimental observation is that the local Nusselt number varies roughly as the square of the decreasing local Reynolds number. An aim of the present note is to examine this situation. This examination leads to the hypothesis that the behavior results from the evolution of the thermal boundary layer developing within the primarily molecular transport layer which is also growing from the wall. Comparisons to direct numerical simulations demonstrate that reasonable predictions are provided by an extension of the Leveque similarity analysis for laminar thermal boundary layers. Furthermore, the present observations modify and improve our fundamental understanding of the process called “relaminarization” in these flows.

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Research Organization:: Idaho National Laboratory, Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP); Ministry of Science, Research and Art Baden-Wurttemberg

Grant/Contract Number:: NE0008412; AC07-05ID14517

OSTI ID:: 1434302

Report Number(s):: INL/JOU--17-42635; PII: S0017931017335986

Journal Information:: International Journal of Heat and Mass Transfer, Journal Name: International Journal of Heat and Mass Transfer Journal Issue: C Vol. 121; ISSN 0017-9310

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (21)

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Related Subjects

99 GENERAL AND MISCELLANEOUS
gas property variation
internal convective heat transfer
laminarization
low-Reynolds-number turbulent
reverse transition
vertical tubes

Title: Internal convective heat transfer to gases in the low-Reynolds-number “turbulent” range

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References (21)

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