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3D‐Flow structures behind a circular cylinder with hemispherical head geometry
Author(s) -
Leder A.,
Grebin U.,
Hassel E.,
Kashkoul Y.,
Ackl A.
Publication year - 2003
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200310311
Subject(s) - wake , cylinder , reynolds number , geometry , turbulence , flow (mathematics) , superposition principle , anemometer , focus (optics) , mechanics , physics , optics , mathematics , quantum mechanics
An experimental investigation of the flow around a finite circular cylinder mounted on a flat plate, see fig. 1, is reported. The aspect ratio L/D (with length L and diameter D) of the cylinder model is 2.0. The focus of this study is toward examining the complex separated flow structures and wake properties. Velocity and turbulence measurements have been carried out with a three component Laser Doppler anemometer (LDA) at the Reynolds number Re D = 2.0 · 10 5 . The experimental results show complex 3D fluid motions in the separated flow region. They are induced by the superposition of three main vortical flows.