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

Abstract

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. The 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 molecular conduction (~ laminar) 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 boundary layers. The present observations modify and improve our fundamental understanding of the process called "relaminarization" in these flows.

Authors:
; ; ;
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1484693
Report Number(s):
INL/JOU-17-42635-Rev000
Journal ID: ISSN 0017-9310
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Heat and Mass Transfer
Additional Journal Information:
Journal Volume: 121; Journal Issue: C; Journal ID: ISSN 0017-9310
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

McEligot, Donald M., Chu, Xu, Skifton, Richard S., and Laurien, Eckart. Internal convective heat transfer to gases in the low-Reynolds-number “turbulent” range. United States: N. p., 2018. Web. https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.086.
McEligot, Donald M., Chu, Xu, Skifton, Richard S., & Laurien, Eckart. Internal convective heat transfer to gases in the low-Reynolds-number “turbulent” range. United States. https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.086
McEligot, Donald M., Chu, Xu, Skifton, Richard S., and Laurien, Eckart. Fri . "Internal convective heat transfer to gases in the low-Reynolds-number “turbulent” range". United States. https://doi.org/10.1016/j.ijheatmasstransfer.2017.12.086. https://www.osti.gov/servlets/purl/1484693.
@article{osti_1484693,
title = {Internal convective heat transfer to gases in the low-Reynolds-number “turbulent” range},
author = {McEligot, Donald M. and Chu, Xu and Skifton, Richard S. and Laurien, Eckart},
abstractNote = {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. The 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 molecular conduction (~ laminar) 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 boundary layers. The present observations modify and improve our fundamental understanding of the process called "relaminarization" in these flows.},
doi = {10.1016/j.ijheatmasstransfer.2017.12.086},
journal = {International Journal of Heat and Mass Transfer},
number = C,
volume = 121,
place = {United States},
year = {2018},
month = {6}
}

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