On the identification of a vortex
Tóm tắt
Considerable confusion surrounds the longstanding question of what
constitutes a vortex, especially in a turbulent flow. This question,
frequently misunderstood as academic, has recently acquired particular
significance since coherent structures (CS) in turbulent flows are now
commonly regarded as vortices. An objective definition of a vortex should
permit the use of vortex dynamics concepts to educe CS, to explain formation
and evolutionary dynamics of CS, to explore the role of CS in turbulence
phenomena, and to develop viable turbulence models and control strategies
for turbulence phenomena. We propose a definition of a vortex in an
incompressible flow in terms of the eigenvalues of the symmetric tensor
Từ khóa
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