Self-Sustaining Formation of Packets of Hairpin Vortices in a Turbulent Wall Layer
Zhou, Jigen
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https://hdl.handle.net/2142/87769
Description
Title
Self-Sustaining Formation of Packets of Hairpin Vortices in a Turbulent Wall Layer
Author(s)
Zhou, Jigen
Issue Date
1997
Doctoral Committee Chair(s)
Adrian, R.J.
Balachandar, S.
Department of Study
Theoretical and Applied Mechanics
Discipline
Theoretical and Applied Mechanics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Mechanical
Language
eng
Abstract
To observe the evolution of vortices, we developed a new vortex identification method and a visualization software. It is observed that the orientation of vortices aligns with the local real eigenvector of the velocity gradient tensor field over almost the entire region occupied by the vortex. By using this feature, the backbone of a vortex can be constructed efficiently.
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