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

Joon Sang Lee, R. H. Pletcher

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish
Title of host publicationProceedings of the 2001 National Heat Transfer Conference Volume 2
Pages1839-1850
Number of pages12
Publication statusPublished - 2001
Event2001 National Heat Transfer Conference (NHTC2001) - Ananheim, CA, United States
Duration: 2001 Jun 102001 Jun 12

Publication series

NameProceedings of the National Heat Transfer Conference
Volume2

Other

Other2001 National Heat Transfer Conference (NHTC2001)
CountryUnited States
CityAnanheim, CA
Period01/6/1001/6/12

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Engineering (miscellaneous)

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  • Cite this

    Lee, J. S., & Pletcher, R. H. (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 (pp. 1839-1850). (Proceedings of the National Heat Transfer Conference; Vol. 2).