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Liutex Shear Interaction in Turbulent Channel Flow

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Liutex and Third Generation of Vortex Identification

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 288))

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Abstract

Vortex structures are ubiquitously present in aerodynamics and hydrodynamics. To study vortex structure, it is obligatory and of great significance to systematically define and visualize vortices. Many methods have been introduced including Q, \({\lambda }_{2}\), Δ, \({\lambda }_{ci}\), \(\Omega\) and Liutex vector-based methods. In this paper, we explore the interaction between Liutex and shear on the basis of the Liutex-shear (R-S) decomposition in a turbulent channel flow with Reynolds number of 180. The results suggest that shearing may strengthen or weaken the magnitude of Liutex depending on their inclined angle. It is inferred that the interaction between Liutex and shear plays an important role in turbulence regeneration cycle.

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Correspondence to Yiqian Wang .

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Ding, Y., Pang, B., Wang, Y. (2023). Liutex Shear Interaction in Turbulent Channel Flow. In: Wang, Y., Gao, Y., Liu, C. (eds) Liutex and Third Generation of Vortex Identification. Springer Proceedings in Physics, vol 288. Springer, Singapore. https://doi.org/10.1007/978-981-19-8955-1_8

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