Spatial mapping of velocity power spectra in Taylor-Couette flow using ultrafast NMR imaging | Zendy

Katsumi Kose | Zendy

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Spatial mapping of velocity power spectra in Taylor-Couette flow using ultrafast NMR imaging

Author(s) -

Katsumi Kose

Publication year - 1994

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.72.1467

Subject(s) - fourier transform , rotation (mathematics) , plane (geometry) , couette flow , physics , taylor–couette flow , flow (mathematics) , spectral density , materials science , nuclear magnetic resonance , mechanics , geometry , mathematics , statistics , quantum mechanics

Ultrafast NMR imaging was used to clarify spatiotemporal structures of wavy Taylor-Couette flow. NMR images designed to give a radial velocity distribution in a cross-sectional plane containing the rotation axis were successively taken at 200 ms time intervals. Distributions of velocity power-spectral components were obtained by temporal Fourier transform of the sequential velocity images. The obtained spectral maps clearly visualized the spatial structures of the wavy components in the cross-sectional plane

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