Effects of Schmidt number on turbulent mass transfer around a rotating circular cylinder

Yoon, Dong-Hyeong, Yang, Kyung-Soo and Bremhorst, Klaus (2011) Effects of Schmidt number on turbulent mass transfer around a rotating circular cylinder. Journal of Fluids Engineering, 133 8: 081204.1-081204.11. doi:10.1115/1.4004635


Author Yoon, Dong-Hyeong
Yang, Kyung-Soo
Bremhorst, Klaus
Title Effects of Schmidt number on turbulent mass transfer around a rotating circular cylinder
Journal name Journal of Fluids Engineering   Check publisher's open access policy
ISSN 0098-2202
1528-901X
Publication date 2011-08
Sub-type Article (original research)
DOI 10.1115/1.4004635
Volume 133
Issue 8
Start page 081204.1
End page 081204.11
Total pages 11
Place of publication Fairfield, NJ, United States
Publisher ASME International
Collection year 2012
Language eng
Formatted abstract
Characteristics of turbulent mass transfer around a rotating circular cylinder have been investigated by Direct Numerical Simulation. The concentration field was computed for three different cases of Schmidt number, Sc = 1, 10 and 100 at ReR*= 336. Our results confirm that the thickness of the Nernst diffusion layer decreases as Sc increases. Walllimiting behavior within the diffusion layer was examined and compared with that of channel flow. Concentration fluctuation time scale was found to scale with r+2, while the time scale ratio nearly equals the Schmidt number throughout the diffusion layer. Scalar modeling closure constants based on gradient diffusion models were found to vary considerably within the diffusion layer. Results of an octant analysis show the significant role played by the ejection and sweep events just as is found for flat plate, channel, and pipe flow boundary layers. Turbulence budgets revealed a strong Sc dependence of turbulent scalar transport. 
Keyword Rotating circular cylinder
Mass transfer
Turbulence
Direct numerical simulation
Schmidt number
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2012 Collection
 
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