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On the local axisymmetry of a vortex
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SYSNO ASEP 0519047 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title On the local axisymmetry of a vortex Author(s) Kolář, Václav (UH-J) SAI, ORCID, RID
Šístek, Jakub (MU-W) RID, ORCID, SAISource Title Proceedings of 16th Asian Congress of Fluid Mechanics. - Singapore : Springer Singapore, 2021 / Venkatakrishnan L. ; Majumdar S. ; Subramanian G. ; Bhat G. S. ; Dasgupta R. ; Arakeri J. - ISSN 2195-4356 - ISBN 978-981-15-5182-6 Pages s. 175-183 Number of pages 6 s. Publication form Print - P Action Asian Congress of Fluid Mechanics /16./ Event date 13.12.2019 - 17.12.2019 VEvent location Bengaluru Country IN - India Event type WRD Language eng - English Country SG - Singapore Keywords vortex ; axisymmetry ; velocity-gradient tensor ; complex eigenvectors ; dual-eigenvectors Subject RIV BK - Fluid Dynamics OECD category Fluids and plasma physics (including surface physics) Subject RIV - cooperation Mathematical Institute - General Mathematics R&D Projects GA18-09628S GA ČR - Czech Science Foundation (CSF) Institutional support UH-J - RVO:67985874 ; MU-W - RVO:67985840 EID SCOPUS 85101493653 DOI 10.1007/978-981-15-5183-3 Annotation The local 3D cylindrical axisymmetry of a vortex is examined. Simple scalar quantities with a clear geometrical interpretation are introduced as suitable analytical tools for visualization of the local axisymmetry and skewness of the flow in the domain characterized by complex eigenvalues of the velocity-gradient tensor. Both complex and real eigenvectors are employed, including the real-valued dual-eigenvectors representing the orthogonal elongated directions in the swirl plane. The proposed quantities are applied to an impulsively started incompressible flow around an inclined flat plate. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2021
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