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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN 打印: 1-56700-135-1

FLOW TOPOLOGY IN A SQUARE ANNULAR DUCT

Abstract

Flow topology techniques are applied to a large eddy simulation database of a square annular duct. The helicity density as well as the topology of the eddying motions are calculated as a function of time over the region of flow surrounding one of the inner duct corners. Turbulence structures are identified from the resulting isosurface plots. The structures are formed along the inner wall near the corner, and then transported diagonally away from the inner duct where they are stretched in the downstream direction by the mean flow field.
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