Direct numerical simulation of turbulent mixing layers with periodic forcing induced inflow

Yukinori Kametani, Masayuki Kawagoe, Koji Fukagata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The direct numerical simulation of the turbulent mixing layer with periodically-forced inflow is performed. The angular frequency ωc was set as a control parameter. To compare the experimental study of Naka et al. (2010), the angular frequency is set to be ω = 0.83 (Case A) and 3.85 (Case B). In the present simulation, the momentum thickness shows the Case A achieved the mixing enhancement, while Case B achieves its suppression. Due to the both controls, the Reynolds normal shear stress, especially vv increases behind the periodic forcing. The Reynolds shear stress uv is suppressed in the Case B at downstream. This region is agree with that the mixing suppression is found in the momentum thickness. Furthermore, the anisotropic tensor indicates that two dimensional large coherent structure is generated in the Case B in which mixing was suppressed.

Original languageEnglish
Title of host publicationInternational Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
PublisherTSFP-8
Volume3
ISBN (Electronic)9780000000002
Publication statusPublished - 2013 Jan 1
Event8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France
Duration: 2013 Aug 282013 Aug 30

Other

Other8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013
CountryFrance
CityPoitiers
Period13/8/2813/8/30

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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