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EXPERIMENTAL INVESTIGATION OF GAP INSTABILITY AND GAP VORTEX STREET DEVELOPMENT IN AN ECCENTRIC ANNULAR CHANNEL

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The onset of gap instability and the development of a gap vortex street in the narrow gap region of an eccentric annular channel have been documented using two-component laser Doppler velocimetry and stereoscopic particle image velocimetry. Reported results include the frequency and amplitude of the cross-gap velocity fluctuations as well as cross-sectional velocity maps, which provide a global view of cross-channel mixing.

Author(s):

George Choueiri    
University of Ottawa
Canada

Stavros Tavoularis    
University of Ottawa
Canada