Extracting 3D vortices in turbulent fluid flow
Jialin Zhong
Huang, T.S.
Adrian, R.J.
Lucent Technol., Bell Labs., Murray Hill, NJ;
This paper appears in: Pattern Analysis and Machine Intelligence, IEEE Transactions on
Publication Date: Feb 1998
Volume: 20,
Issue: 2
On page(s): 193-199
ISSN: 0162-8828
References Cited: 21
CODEN: ITPIDJ
INSPEC Accession Number: 5873757
Digital Object Identifier: 10.1109/34.659938
Current Version Published: 2002-08-06
Abstract
This paper presents a computational framework to extract salient
patterns, called vortex structures, from 3D turbulent fluid flows. These
structures can be characterized as regions of dominating rotational
motion in the velocity fields and intensity concentrations in the
corresponding vorticity fields. A pointwise linear representation is
employed to approximate the kinematics of the flow field, and the fluid
motion is classified according to motion analysis or topological
patterns. The regions of vortex structures are identified as those
dominated by rotational motion or those of focus-type singularity. The
2D vortices, as a special case of 3D vortices, are detected by searching
for regions of vorticity concentrations
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