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Concentration and velocity field measurements in turbulent flows using laser-induced fluorescence tomography (LIFT)

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Laser-Induced Fluorescence is used to tomographically produce volume information of concentration distribution in a turbulent shear flow. Based on Adaptive Least Squares Correlation (ALSC) of grey level distributions in small patches cut out of consecutive tomographically constructed observation volumes, 3-D fields of velocity, vorticity and rate-of-strain are determined with high spatial resolution, satisfactory temporal resolution and high accuracy. This novel technique opens new perspectives for the study of mixing processes.

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Merkel, G.J., Rys, P., Rys, F.S. et al. Concentration and velocity field measurements in turbulent flows using laser-induced fluorescence tomography (LIFT). Appl. Sci. Res. 56, 181–190 (1996).

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Key words

  • turbulent mixing
  • Laser-Induced Fluorescence
  • tomography
  • grey level correlation
  • velocity field