Year: 2019
Author: Xianyang Jiang
Advances in Applied Mathematics and Mechanics, Vol. 11 (2019), Iss. 3 : pp. 640–652
Abstract
In this paper, Lagrangian tracking of a specific material surface and Lagrangian-averaged vorticity deviation (LAVD) are applied to experimental data sets of two kinds of wall-bounded flows to detect coherent structures. One is used for laminar boundary layer with wall-mounted hemisphere, the other is used for turbulent boundary layer. Lagrangian coherent structures detected in a hemisphere protruded laminar boundary layer show some similarity with Eulerian-detected hairpin vortices. However, the LAVD-based vortices and the evolution of material surface demonstrated in turbulent boundary layer are different from the patterns in the wake of the hairpin shedding hemisphere. The wavelike deformed material surfaces appear to support the importance of three-dimensional wave structures in the near-wall turbulence production process. The Lagrangian methods provide another perspective in understanding coherent structures in wall-bounded flows.
You do not have full access to this article.
Already a Subscriber? Sign in as an individual or via your institution
Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/aamm.2018.s08
Advances in Applied Mathematics and Mechanics, Vol. 11 (2019), Iss. 3 : pp. 640–652
Published online: 2019-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 13
Keywords: Lagrangian coherent structure tomographic PIV turbulent boundary layer hairpin vortices.
Author Details
-
Structure evolution at early stage of boundary-layer transition: simulation and experiment
Jiang, X. Y. | Lee, C. B. | Chen, X. | Smith, C. R. | Linden, P. F.Journal of Fluid Mechanics, Vol. 890 (2020), Iss.
https://doi.org/10.1017/jfm.2020.107 [Citations: 29] -
Revisiting hot-wire anemometer measurement of Tollmien–Schlichting waves on a flat plate
Jiang, Xianyang
International Journal of Modern Physics B, Vol. 34 (2020), Iss. 14n16 P.2040095
https://doi.org/10.1142/S0217979220400950 [Citations: 2] -
Flow structures in transitional and turbulent boundary layers
Lee, Cunbiao | Jiang, XianyangPhysics of Fluids, Vol. 31 (2019), Iss. 11
https://doi.org/10.1063/1.5121810 [Citations: 107] -
Description of phase separation motion in gas‒liquid two-phase flow
Wu, Xitong | Li, Chenhao | Luo, Xingqi | Feng, Jianjun | Wang, LikeInternational Journal of Multiphase Flow, Vol. 181 (2024), Iss. P.104998
https://doi.org/10.1016/j.ijmultiphaseflow.2024.104998 [Citations: 0]