Large eddy simulation of variable property turbulent flow in a vertical channel with buoyancy effects and heat transfer

Joon Sang Lee; R. H. Pletcher

Large eddy simulation of variable property turbulent flow in a vertical channel with buoyancy effects and heat transfer

Joon Sang Lee, R. H. Pletcher

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

Turbulent combined flow of forced and natural convection was investigated using large eddy simulations (LES) for a vertical channel flow with significant heat transfer. The walls were maintained at constant temperatures, one heated and the other cooled, at temperature ratios of 1.01, 1.99 and 3.00. Results showed that aiding and opposing flows emerge near the heated and cooled walls, respectively, while the pressure gradient drives the mean flow upwards. Buoyancy effects on the mean velocity, temperature, and turbulent intensities were observed near the walls. In the aiding flow, the turbulent intensities and heat transfer were suppressed and the flow was relaminarized at large values of Grashof number. In the opposing flow, however, turbulence was enhanced with increasing velocity fluctuations.

Original language	English
Title of host publication	Proceedings of the 2001 National Heat Transfer Conference Volume 2
Pages	1839-1850
Number of pages	12
Publication status	Published - 2001
Event	2001 National Heat Transfer Conference (NHTC2001) - Ananheim, CA, United States Duration: 2001 Jun 10 → 2001 Jun 12

Publication series

Name	Proceedings of the National Heat Transfer Conference
Volume	2

Other

Other	2001 National Heat Transfer Conference (NHTC2001)
Country/Territory	United States
City	Ananheim, CA
Period	01/6/10 → 01/6/12

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)
Engineering (miscellaneous)

Cite this

@inproceedings{1853f82150234d76bc337c6c32aa4a9a,

title = "Large eddy simulation of variable property turbulent flow in a vertical channel with buoyancy effects and heat transfer",

abstract = "Turbulent combined flow of forced and natural convection was investigated using large eddy simulations (LES) for a vertical channel flow with significant heat transfer. The walls were maintained at constant temperatures, one heated and the other cooled, at temperature ratios of 1.01, 1.99 and 3.00. Results showed that aiding and opposing flows emerge near the heated and cooled walls, respectively, while the pressure gradient drives the mean flow upwards. Buoyancy effects on the mean velocity, temperature, and turbulent intensities were observed near the walls. In the aiding flow, the turbulent intensities and heat transfer were suppressed and the flow was relaminarized at large values of Grashof number. In the opposing flow, however, turbulence was enhanced with increasing velocity fluctuations.",

author = "Lee, {Joon Sang} and Pletcher, {R. H.}",

year = "2001",

language = "English",

isbn = "0791835332",

series = "Proceedings of the National Heat Transfer Conference",

pages = "1839--1850",

booktitle = "Proceedings of the 2001 National Heat Transfer Conference Volume 2",

note = "2001 National Heat Transfer Conference (NHTC2001) ; Conference date: 10-06-2001 Through 12-06-2001",

}

Lee, JS & Pletcher, RH 2001, Large eddy simulation of variable property turbulent flow in a vertical channel with buoyancy effects and heat transfer. in Proceedings of the 2001 National Heat Transfer Conference Volume 2. Proceedings of the National Heat Transfer Conference, vol. 2, pp. 1839-1850, 2001 National Heat Transfer Conference (NHTC2001), Ananheim, CA, United States, 01/6/10.

Large eddy simulation of variable property turbulent flow in a vertical channel with buoyancy effects and heat transfer. / Lee, Joon Sang; Pletcher, R. H.

Proceedings of the 2001 National Heat Transfer Conference Volume 2. 2001. p. 1839-1850 (Proceedings of the National Heat Transfer Conference; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Large eddy simulation of variable property turbulent flow in a vertical channel with buoyancy effects and heat transfer

AU - Lee, Joon Sang

AU - Pletcher, R. H.

PY - 2001

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N2 - Turbulent combined flow of forced and natural convection was investigated using large eddy simulations (LES) for a vertical channel flow with significant heat transfer. The walls were maintained at constant temperatures, one heated and the other cooled, at temperature ratios of 1.01, 1.99 and 3.00. Results showed that aiding and opposing flows emerge near the heated and cooled walls, respectively, while the pressure gradient drives the mean flow upwards. Buoyancy effects on the mean velocity, temperature, and turbulent intensities were observed near the walls. In the aiding flow, the turbulent intensities and heat transfer were suppressed and the flow was relaminarized at large values of Grashof number. In the opposing flow, however, turbulence was enhanced with increasing velocity fluctuations.

AB - Turbulent combined flow of forced and natural convection was investigated using large eddy simulations (LES) for a vertical channel flow with significant heat transfer. The walls were maintained at constant temperatures, one heated and the other cooled, at temperature ratios of 1.01, 1.99 and 3.00. Results showed that aiding and opposing flows emerge near the heated and cooled walls, respectively, while the pressure gradient drives the mean flow upwards. Buoyancy effects on the mean velocity, temperature, and turbulent intensities were observed near the walls. In the aiding flow, the turbulent intensities and heat transfer were suppressed and the flow was relaminarized at large values of Grashof number. In the opposing flow, however, turbulence was enhanced with increasing velocity fluctuations.

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T3 - Proceedings of the National Heat Transfer Conference

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BT - Proceedings of the 2001 National Heat Transfer Conference Volume 2

T2 - 2001 National Heat Transfer Conference (NHTC2001)

Y2 - 10 June 2001 through 12 June 2001

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Large eddy simulation of variable property turbulent flow in a vertical channel with buoyancy effects and heat transfer

Abstract

Publication series

Other

All Science Journal Classification (ASJC) codes

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