Dynamical features of the wake behind a pitching foil

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Jian DengXueming Shao

Abstract

As an extension of the previous study on the three-dimensional transition of the wake behind a pitching foil [Deng and Caulfield, Phys. Rev. E 91, 043017 (2015)]PLEEE81539-375510.1103/PhysRevE.91.043017, this investigation draws a comprehensive map on the pitching frequency-amplitude phase space. First, by fixing the Reynolds number at Re=1700 and varying the pitching frequency and amplitude, we identify three key dynamical features of the wake: first, the transition from Bénard-von Kármán (BvK) vortex streets to reverse BvK vortex streets, and second, the symmetry breaking of this reverse BvK wake leading to a deflected wake, and a further transition from two-dimensional (2D) wakes to three-dimensional (3D) wakes. The transition boundary between the 2D and 3D wakes lies top right of the wake deflection boundary, implying a correlation between the wake deflection and the 2D to 3D wake transition, confirming that this transition occurs after the wake deflection. This paper supports the previous extensive numerical studies under two-dimensional assumption at low Reynolds number, since it is indeed two dimensional except for the cases at very high pitching frequencies or large amplitudes. Furthermore, by three-dimensional direct n...Continue Reading

References

Oct 14, 2000·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·D BarkleyM Golubitsky
Oct 29, 2003·The Journal of Experimental Biology·Sanjay P Sane
Mar 21, 2008·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ramiro Godoy-DianaJosé Eduardo Wesfreid
May 15, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jian Deng, C P Caulfield

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Citations

Feb 17, 2018·Physical Review. E·Liping SunXueming Shao
Jan 23, 2020·Physical Review. E·Yaqing JinLeonardo P Chamorro
Feb 20, 2020·Physical Review. E·Hongyu ZhengYao Zheng
Oct 16, 2016·Physical Review. E·Jian DengXuerui Mao

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