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

E. E.M. Olsson; L. M. Ahrné; A. C. Trägårdh

doi:10.1016/j.jfoodeng.2004.04.030

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

E. E.M. Olsson^*, L. M. Ahrné, A. C. Trägårdh

^*Corresponding author for this work

37 Citations (Scopus)

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.

Original language	English
Journal	Journal of Food Engineering
Volume	67
Issue number	3
Pages (from-to)	273-280
Number of pages	8
ISSN	0260-8774
DOIs	https://doi.org/10.1016/j.jfoodeng.2004.04.030
Publication status	Published - 2005
Externally published	Yes

Keywords

CFD
Cylinder
Food
Jet impingement heat transfer
Multiple jets
Nusselt number
SST

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10.1016/j.jfoodeng.2004.04.030

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@article{ebdc39e3e0b24d5bbfca5e7ebb2b1133,

title = "Flow and heat transfer from multiple slot air jets impinging on circular cylinders",

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 Nus = 0.20Re0.68. For three jets, the heat transfer distribution is different on the outer cylinders, as compared to the cylinder in the centre.",

keywords = "CFD, Cylinder, Food, Jet impingement heat transfer, Multiple jets, Nusselt number, SST",

author = "Olsson, {E. E.M.} and Ahrn{\'e}, {L. M.} and Tr{\"a}g{\aa}rdh, {A. C.}",

year = "2005",

doi = "10.1016/j.jfoodeng.2004.04.030",

language = "English",

volume = "67",

pages = "273--280",

journal = "Journal of Food Engineering",

issn = "0260-8774",

publisher = "Elsevier",

number = "3",

}

TY - JOUR

T1 - Flow and heat transfer from multiple slot air jets impinging on circular cylinders

AU - Olsson, E. E.M.

AU - Ahrné, L. M.

AU - Trägårdh, A. C.

PY - 2005

Y1 - 2005

N2 - 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 Nus = 0.20Re0.68. For three jets, the heat transfer distribution is different on the outer cylinders, as compared to the cylinder in the centre.

AB - 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 Nus = 0.20Re0.68. For three jets, the heat transfer distribution is different on the outer cylinders, as compared to the cylinder in the centre.

KW - CFD

KW - Cylinder

KW - Food

KW - Jet impingement heat transfer

KW - Multiple jets

KW - Nusselt number

KW - SST

U2 - 10.1016/j.jfoodeng.2004.04.030

DO - 10.1016/j.jfoodeng.2004.04.030

M3 - Journal article

AN - SCOPUS:9944245455

SN - 0260-8774

VL - 67

SP - 273

EP - 280

JO - Journal of Food Engineering

JF - Journal of Food Engineering

IS - 3

ER -

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

Abstract

Keywords

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