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Numerical Simulation of Coherent Structures in the Turbulent Boundary Layer under Different Stability Conditions

Author

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  • Shujin Laima

    (Key Lab of Smart Prevention and Mitigation for Civil Engineering Disasters of the Ministry of Industry and Information, Harbin Institute of Technology, Harbin 150090, China
    Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
    School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

  • Hehe Ren

    (Key Lab of Smart Prevention and Mitigation for Civil Engineering Disasters of the Ministry of Industry and Information, Harbin Institute of Technology, Harbin 150090, China
    Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
    School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

  • Hui Li

    (Key Lab of Smart Prevention and Mitigation for Civil Engineering Disasters of the Ministry of Industry and Information, Harbin Institute of Technology, Harbin 150090, China
    Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
    School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

  • Jinping Ou

    (Key Lab of Smart Prevention and Mitigation for Civil Engineering Disasters of the Ministry of Industry and Information, Harbin Institute of Technology, Harbin 150090, China
    Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China
    School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

Abstract

Coherent structures in the turbulent boundary layer were investigated under different stability conditions. Qualitative analyses of the flow field, spatial correlation coefficient field and pre-multiplied wind velocity spectrum showed that the dominant turbulent eddy structure changed from small-scale motions to large- and very-large-scale motions and then to thermal plumes as the stability changed from strong stable to neutral and then to strong unstable. A quantitative analysis of the size characteristics of the three-dimensional turbulent eddy structure based on the spatial correlation coefficient field showed that under near-neutral stability, the streamwise, wall-normal and spanwise extents remained constant at approximately 0.3 δ , 0.1 δ and 0.2 δ ( δ , boundary layer height), respectively, while for other conditions, the extent in each direction varied in a log-linear manner with stability; only the spanwise extent under stable conditions was also independent of stability. The peak wavenumber of the pre-multiplied wind velocity spectrum moves towards small values from stable conditions to neutral condition and then to unstable conditions; thus, for the wind velocity spectrum, another form is needed that takes account the effects of the stability condition.

Suggested Citation

  • Shujin Laima & Hehe Ren & Hui Li & Jinping Ou, 2020. "Numerical Simulation of Coherent Structures in the Turbulent Boundary Layer under Different Stability Conditions," Energies, MDPI, vol. 13(5), pages 1-19, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1068-:d:326711
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    References listed on IDEAS

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    1. Hehe Ren & Shujin Laima & Hui Li, 2020. "Numerical Investigation of Very-Large-Scale Motions in a Turbulent Boundary Layer for Different Roughness," Energies, MDPI, vol. 13(3), pages 1-26, February.
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