Abstract
In this paper, we have used Liutex, Liutex core lines, and some other second-generation vortex identification criteria to capture and visualize the vortex structure of direct numerical simulation data of a flat plate boundary layer transition. The focus of our study is on Λ and hairpin vortices in the transitional region of the boundary layer. We investigated how the change in threshold impacts the iso-surface plotting of different criteria. From our study, it was found that second generation vortex identification criteria like Δ Q, λ2and λciare threshold sensitive but Omega method is not. Moreover, we have used Liutex core lines technique to represent the vortex structure which is unique and not limited by the threshold adjustment.
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Shrestha, P., Bhattarai, A., Liu, C. (2021). Application of Liutex and Some Second-Generation Vortex Identification Methods to Direct Numerical Simulation Data of a Transitional Boundary Layer. In: Liu, C., Wang, Y. (eds) Liutex and Third Generation of Vortex Definition and Identification. Springer, Cham. https://doi.org/10.1007/978-3-030-70217-5_19
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DOI: https://doi.org/10.1007/978-3-030-70217-5_19
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