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Flow structure and heat transfer characteristics in a ribbed two-pass channel with varying divider inclination angle

Yan, Han ; Luo, Lei ; Du, Wei LU ; Wang, Songtao ; Sunden, Bengt LU and Huang, Dan LU (2021) In International Journal of Thermal Sciences
Abstract

A numerical method is utilized in this paper to study the effects of varying divider inclination angle on the flow structure and heat transfer characteristics in a ribbed two-pass channel for Reynolds number varying from 10,000 to 50,000. The studied divider inclination angles are −3°,−2°,−1°,0°, +1°, +2° and +3°. The ribs have an orientating angle of 45°. The results show that the heat transfer in the bend region and in the passage upstream the bend is enhanced significantly and the heat transfer in the passage downstream the bend is reduced compared to a channel with a straight divider wall as the divider wall inclination angle varies from... (More)

A numerical method is utilized in this paper to study the effects of varying divider inclination angle on the flow structure and heat transfer characteristics in a ribbed two-pass channel for Reynolds number varying from 10,000 to 50,000. The studied divider inclination angles are −3°,−2°,−1°,0°, +1°, +2° and +3°. The ribs have an orientating angle of 45°. The results show that the heat transfer in the bend region and in the passage upstream the bend is enhanced significantly and the heat transfer in the passage downstream the bend is reduced compared to a channel with a straight divider wall as the divider wall inclination angle varies from −3° to +3°. Channels with inclined divider wall produce higher pressure drop and friction factors than a channel with straight divider wall. According to the results, a channel with −1° inclined divider shows the best thermal performance among all the channels investigated. The flow structure and heat transfer characteristics for all the channels are depicted in detail and discussed in this study.

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organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
45rib, Divider wall inclination angle, Heat transfer, Inclined divider wall, Two-pass channel
in
International Journal of Thermal Sciences
article number
106969
publisher
Elsevier
external identifiers
  • scopus:85104088782
ISSN
1290-0729
DOI
10.1016/j.ijthermalsci.2021.106969
language
English
LU publication?
yes
id
e4ccced0-5751-46cf-9885-02ea0751f576
date added to LUP
2021-04-21 09:28:14
date last changed
2021-04-21 09:28:14
@article{e4ccced0-5751-46cf-9885-02ea0751f576,
  abstract     = {<p>A numerical method is utilized in this paper to study the effects of varying divider inclination angle on the flow structure and heat transfer characteristics in a ribbed two-pass channel for Reynolds number varying from 10,000 to 50,000. The studied divider inclination angles are −3<sup>°</sup>,−2<sup>°</sup>,−1<sup>°</sup>,0<sup>°</sup>, +1<sup>°</sup>, +2<sup>°</sup> and +3<sup>°</sup>. The ribs have an orientating angle of 45<sup>°</sup>. The results show that the heat transfer in the bend region and in the passage upstream the bend is enhanced significantly and the heat transfer in the passage downstream the bend is reduced compared to a channel with a straight divider wall as the divider wall inclination angle varies from −3<sup>°</sup> to +3<sup>°</sup>. Channels with inclined divider wall produce higher pressure drop and friction factors than a channel with straight divider wall. According to the results, a channel with −1<sup>°</sup> inclined divider shows the best thermal performance among all the channels investigated. The flow structure and heat transfer characteristics for all the channels are depicted in detail and discussed in this study.</p>},
  author       = {Yan, Han and Luo, Lei and Du, Wei and Wang, Songtao and Sunden, Bengt and Huang, Dan},
  issn         = {1290-0729},
  language     = {eng},
  publisher    = {Elsevier},
  series       = {International Journal of Thermal Sciences},
  title        = {Flow structure and heat transfer characteristics in a ribbed two-pass channel with varying divider inclination angle},
  url          = {http://dx.doi.org/10.1016/j.ijthermalsci.2021.106969},
  doi          = {10.1016/j.ijthermalsci.2021.106969},
  year         = {2021},
}