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Heat transfer from a slot air jet impinging on a circular cylinder

Olsson, E E M; Ahrné, L M and Trägårdh, Christian LU (2004) In Journal of Food Engineering 63(4). p.393-401
Abstract
Heat transfer from a slot air jet impinging on a cylinder shaped food product placed on a solid surface in a semi-confined area as investigated using computational fluid dynamics (CFD). Simulations of a cylinder in cross flow with the k-epsilon, k-omega and SST models in CFX 5.5 were compared with measurements in the literature. The SST model predicts the heat transfer better than the other models and is therefore used in this study. The distribution of the local Nusselt numbers around the cylinder for various Reynolds numbers (23,000-100,000), jet-to-cylinder distances, H/d (2-8), and cylinder curvature, d/D (0.29-1.14) was determined. The results show that the local Nusselt numbers varies around the surface of the cylinder and that the... (More)
Heat transfer from a slot air jet impinging on a cylinder shaped food product placed on a solid surface in a semi-confined area as investigated using computational fluid dynamics (CFD). Simulations of a cylinder in cross flow with the k-epsilon, k-omega and SST models in CFX 5.5 were compared with measurements in the literature. The SST model predicts the heat transfer better than the other models and is therefore used in this study. The distribution of the local Nusselt numbers around the cylinder for various Reynolds numbers (23,000-100,000), jet-to-cylinder distances, H/d (2-8), and cylinder curvature, d/D (0.29-1.14) was determined. The results show that the local Nusselt numbers varies around the surface of the cylinder and that the average Nusselt number and the stagnation point Nusselt number increases with increasing Reynolds numbers and surface curvature but has little dependency on the jet-to-cylinder distance. The result is Nu(m) = 0.14Re(0.65)(H/d)(-0.077)(d/D)(0.32) and Nu(s) = 0.46Re(0.59)(H/d)(-0.026)(d/D)(0.32). (C) 2003 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Food, Cylinder, CFD, SST, Nusselt number, Jet impingement heat transfer, Cooling
in
Journal of Food Engineering
volume
63
issue
4
pages
393 - 401
publisher
Elsevier
external identifiers
  • wos:000220575300005
  • scopus:1242331414
ISSN
0260-8774
DOI
10.1016/j.jfoodeng.2003.08.009
language
English
LU publication?
yes
id
8a4cb054-b489-4e31-a8c7-13f4c794533a (old id 139243)
date added to LUP
2007-07-19 09:08:20
date last changed
2017-12-17 03:52:20
@article{8a4cb054-b489-4e31-a8c7-13f4c794533a,
  abstract     = {Heat transfer from a slot air jet impinging on a cylinder shaped food product placed on a solid surface in a semi-confined area as investigated using computational fluid dynamics (CFD). Simulations of a cylinder in cross flow with the k-epsilon, k-omega and SST models in CFX 5.5 were compared with measurements in the literature. The SST model predicts the heat transfer better than the other models and is therefore used in this study. The distribution of the local Nusselt numbers around the cylinder for various Reynolds numbers (23,000-100,000), jet-to-cylinder distances, H/d (2-8), and cylinder curvature, d/D (0.29-1.14) was determined. The results show that the local Nusselt numbers varies around the surface of the cylinder and that the average Nusselt number and the stagnation point Nusselt number increases with increasing Reynolds numbers and surface curvature but has little dependency on the jet-to-cylinder distance. The result is Nu(m) = 0.14Re(0.65)(H/d)(-0.077)(d/D)(0.32) and Nu(s) = 0.46Re(0.59)(H/d)(-0.026)(d/D)(0.32). (C) 2003 Elsevier Ltd. All rights reserved.},
  author       = {Olsson, E E M and Ahrné, L M and Trägårdh, Christian},
  issn         = {0260-8774},
  keyword      = {Food,Cylinder,CFD,SST,Nusselt number,Jet impingement heat transfer,Cooling},
  language     = {eng},
  number       = {4},
  pages        = {393--401},
  publisher    = {Elsevier},
  series       = {Journal of Food Engineering},
  title        = {Heat transfer from a slot air jet impinging on a circular cylinder},
  url          = {http://dx.doi.org/10.1016/j.jfoodeng.2003.08.009},
  volume       = {63},
  year         = {2004},
}