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Lee, Jae Hwa
Flow Physics and Control Lab
Research Interests
  • Turbulent Flow Physics and Control
  • Incompressible and Compressible Flows
  • Fluid-Structure Interaction
  • Multi-Phase Flow with Heat Transfer

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Direct numerical simulations of fully developed turbulent pipe flows for Re-tau=180, 544 and 934

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Title
Direct numerical simulations of fully developed turbulent pipe flows for Re-tau=180, 544 and 934
Author
Ahn, JunsunLee, Jae HwaJang, Sung JaeSung, Hyung Jin
Keywords
Amplitude modulation; Direct numerical simulation; Streamwise turbulence intensity; Turbulent pipe flow
Issue Date
2013-12
Publisher
ELSEVIER SCIENCE INC
Citation
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, v.44, no., pp.222 - 228
Abstract
Direct numerical simulations (DNSs) of fully developed turbulent pipe flows with a 30. R streamwise domain for Reτ= 180, 544 and 934 were performed to see the turbulence statistics and the interactions between the near-wall and outer regions. There are some slight discrepancies between previous DNS data for turbulent pipe flows with low Reynolds numbers Reτ≈ 180 and the present data. These discrepancies arise because DNS results are sensitive to numerical conditions such as grid resolution and distribution. Our DNS data for various Reynolds numbers show that the near-wall peak in the streamwise turbulence intensity increases with increasing the Reynolds number. Evidence to support this finding was found in pre-multiplied energy spectra and the two-point amplitude modulation (AM) covariance. It was determined that both the long wavelength energy near the wall and the non-linear effects of AM contribute to the growth of the near-wall peak in the streamwise Reynolds stress.
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DOI
10.1016/j.ijheatfluidflow.2013.05.022
ISSN
0142-727X
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