Formation and Interaction of Two Parallel Vortex Streets

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概要

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• The instability of two pairs of infinitely long parallel vortex sheets for initial disturbances is investigated by a linear analysis in an inviscid incompressible fluid, and it is shown paradoxically that two pairs of parallel vortex sheets can not exist at a gap distance between two pairs less than the distance between vortex sheets of each pair. By calculating the non-linear growth in time of periodic disturbances in the vortex sheets, the essential features of the formation and interaction of two parallel vortex streets are analysed, and it is explained that the initially antisymmetric disturbance is more apt to cause the interaction between two vortex streets in their developing stage than the symmetric one. These theoretical results are compared with the experimental ones which were observed in a flow past two circular cylinders spaced in the direction perpendicular to a uniform flow.

• 一般社団法人日本機械学会の論文

著者

• Kamemoto Kyoji

  Faculty Of Engineering Yokohama National University

関連論文

• Investigation of Turbulent Wall Jets over Logarithmic Spiral Surfaces : 1st Report, Development of Jets and Similarity of Velocity Profile
• Characteristics of the Flow around a Bluff Body near a Plane Surface
• Formation and Interaction of Two Parallel Vortex Streets
• Investigation of Turbulent Wall Jets over Logarithmic Spiral Surfaces : 2nd Report, Properties of Flow near Wall

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