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The reduction of pressure losses in thermally modulated vertical channels
Citation
Floryan, JM and Wang, W and Bassom, AP, The reduction of pressure losses in thermally modulated vertical channels, Journal of Fluid Mechanics, 954, (38) pp. 1-32. ISSN 1469-7645 (2023) [Refereed Article]
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Copyright Statement
© The Author(s), 2023. Published by Cambridge University Press. This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, (https://creativecommons.org/licenses/by/4.0/) which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
DOI: doi:10.1017/jfm.2022.1027
Abstract
The role played by patterned heating in reducing pressure losses within vertical conduits
is investigated. The heating generates flow separation structures which reduce the direct
contact between the stream and the sidewalls, thereby limiting the frictional resistance.
This also modifies the temperature field thereby inducing a net buoyancy force which
may either assist or oppose the pressure gradient required to maintain a fixed flow rate.
If the flow Reynolds number is increased sufficiently, the separation structures may be
washed away, which means that the pressure-gradient-reducing mechanism is eliminated.
The details of the system response are a function of the form of spatial heating distribution,
its intensity, the flow Reynolds number and the fluid Prandtl number. Carefully chosen
heating of the two walls can induce a pattern interaction effect and a judicious choice of
the two patterns can have as much as an order of magnitude effect on the system response.
Item Details
Item Type: | Refereed Article |
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Keywords: | eduction of pressure losses, flow control, natural convection, structured convection |
Research Division: | Mathematical Sciences |
Research Group: | Applied mathematics |
Research Field: | Theoretical and applied mechanics |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the mathematical sciences |
UTAS Author: | Bassom, AP (Professor Andrew Bassom) |
ID Code: | 154914 |
Year Published: | 2023 |
Deposited By: | Mathematics |
Deposited On: | 2023-01-18 |
Last Modified: | 2023-02-09 |
Downloads: | 0 |
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