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Flow and heat transfer from multiple slot air jets impinging on circular cylinders

Olsson, E E M; Ahrne, L M and Trägårdh, Christian LU (2005) In Journal of Food Engineering 67(3). p.273-280
Abstract
This study presents flow and heat transfer predictions of multiple slot air jets impinging on circular cylinders using CFD (computational fluid dynamics). The distribution of Nusselt numbers around the cylinders for different Reynolds numbers (23,000-100,000), distances between the jets, and openings between them was determined for two and three jets and compared to simulations of a single jet. The flow characteristics and the heat transfer distribution around the cylinders are found to be dependent on the distance and the opening between the jets. The interaction between two jets is found to be most advantageous. The heat transfer increases for higher Reynolds number in general; for two jets the heat transfer in the stagnation point is... (More)
This study presents flow and heat transfer predictions of multiple slot air jets impinging on circular cylinders using CFD (computational fluid dynamics). The distribution of Nusselt numbers around the cylinders for different Reynolds numbers (23,000-100,000), distances between the jets, and openings between them was determined for two and three jets and compared to simulations of a single jet. The flow characteristics and the heat transfer distribution around the cylinders are found to be dependent on the distance and the opening between the jets. The interaction between two jets is found to be most advantageous. The heat transfer increases for higher Reynolds number in general; for two jets the heat transfer in the stagnation point is Nu(s) = 0.20Re(0.68). For three jets, the heat transfer distribution is different on the outer cylinders, as compared to the cylinder in the centre. (C) 2004 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Jet impingement heat transfer, Multiple jets, Nusselt number, CFD, SST, Cylinder, Food
in
Journal of Food Engineering
volume
67
issue
3
pages
273 - 280
publisher
Elsevier
external identifiers
  • wos:000226300300004
  • scopus:9944245455
ISSN
0260-8774
DOI
10.1016/j.jfoodeng.2004.04.030
language
English
LU publication?
yes
id
00aeb367-0ff5-439b-a685-cff60c0e5071 (old id 152105)
date added to LUP
2007-07-19 09:18:21
date last changed
2017-07-30 04:39:27
@article{00aeb367-0ff5-439b-a685-cff60c0e5071,
  abstract     = {This study presents flow and heat transfer predictions of multiple slot air jets impinging on circular cylinders using CFD (computational fluid dynamics). The distribution of Nusselt numbers around the cylinders for different Reynolds numbers (23,000-100,000), distances between the jets, and openings between them was determined for two and three jets and compared to simulations of a single jet. The flow characteristics and the heat transfer distribution around the cylinders are found to be dependent on the distance and the opening between the jets. The interaction between two jets is found to be most advantageous. The heat transfer increases for higher Reynolds number in general; for two jets the heat transfer in the stagnation point is Nu(s) = 0.20Re(0.68). For three jets, the heat transfer distribution is different on the outer cylinders, as compared to the cylinder in the centre. (C) 2004 Elsevier Ltd. All rights reserved.},
  author       = {Olsson, E E M and Ahrne, L M and Trägårdh, Christian},
  issn         = {0260-8774},
  keyword      = {Jet impingement heat transfer,Multiple jets,Nusselt number,CFD,SST,Cylinder,Food},
  language     = {eng},
  number       = {3},
  pages        = {273--280},
  publisher    = {Elsevier},
  series       = {Journal of Food Engineering},
  title        = {Flow and heat transfer from multiple slot air jets impinging on circular cylinders},
  url          = {http://dx.doi.org/10.1016/j.jfoodeng.2004.04.030},
  volume       = {67},
  year         = {2005},
}