Topological Analysis Of A Junction Vortex Flow
Author(s)
F. Ballio & S. Franzetti
Abstract
When a two-dimensional boundary layer on a plane surface encounters an
obstacle, a three-dimensional separation is induced, and a complex necklace
vortex system is created. In this paper, numerical solutions for the laminar vortex
flow generated at a cylinder-wall intersection are analysed with respect to their
topological structures. The nature and connections of singular points for the
velocity and shear stress fields are identified. The topological consistency of the
resulting vortex pattern is thoroughly discussed, as well as its robustness to
changes in the physical and numerical parameters. Similar numerical and
experimental results in the literature are considered for a comparison. Our
analysis shows that both an insufficient spatial resolution and numerical or
experimental errors may easily lead to misinterpretation of the vortex
Keywords
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