A spanwise traveling wave of blowing and suction method is applied to reduce the drag in a turbulent channel flow with R e τ = 180 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$Re_{\tau }=180$$\end{document}. The direction of the traveling wave reverses periodically to generate a similar oscillatory spanwise motion as the wall oscillation. Results from direct numerical simulations show that the blowing and suction control can achieve a slightly smaller drag reduction, compared with the wall oscillation with a same optimal period and strength. The pressure-strain correlation is found related to the drag reduction closely.


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    Title :

    Drag Reduction Control in Turbulent Channel with a Spanwise Traveling Wave of Blowing and Suction


    Additional title:

    Computational Methods


    Contributors:


    Publication date :

    2022-12-13


    Size :

    15 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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