A new kind of hairpin-like vortical structure induced by cross-interaction of sinuous streaks in turbulent channel<xref rid="cpb_27_8_084701fn1" ref-type="fn">*</xref> <fn id="cpb_27_8_084701fn1"><label>*</label><p>Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LQ18A020002), the National Natural Science Foundation of China (Grant No. 41776105), and the Foundation of the Educational Committee of Zhejiang Province, China (Grant No. Y201737053).</p></fn>

A new kind of hairpin-like vortical structure induced by cross-interaction of sinuous streaks in turbulent channel* *

Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LQ18A020002), the National Natural Science Foundation of China (Grant No. 41776105), and the Foundation of the Educational Committee of Zhejiang Province, China (Grant No. Y201737053).

Li Jian¹, Dong Gang^{2, †}, Zhang Hui², Chen Zhengshou^{1, 3}, Zhang Zhaode^{1, 3}

(color online) Three-dimensional view of NHV (Ω = 0.53, grey color) and flowfields in the y–z plane (x⁺ = 240) at t⁺ = 162. Solid and dashed lines in the y–z plane indicate high- and low-speed streaks, respectively, whose maximum and minimum values of streamwise velocity fluctuations are u⁺ = 2.0 and −4.0 in steps of 0.3.