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White-light speckle method for obtaining an equi-velocity map of a whole flow field

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Abstract

The surface of a flow seeded with aluminium oxide particles is photographed with two pulsed illuminations of whitelight. When the resultant double-exposure specklegram is optically processed using a spatial filtering technique, an equivelocity pattern can be obtained. Especially, a coloured display of the pattern by the white-light reconstruction gives many useful informations about the flow state.

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References

  • Bernabeu, E.; Amare, J. C.; Arroyo, M. P. 1982: White-light speckle method of measurement of flow velocity distribution. Appl. Opt, 21, 2583–2586

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  • Hosoi, K.; Kawahashi, M.; Toyooka, S.; Suzuki, M. 1982: Measurements of velocity distributions by means of a white-light speckle photography (in Japanese). J. Flow Visu. S. Jpn. 2, 409–414

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering, Saitama University, 255 Shimo-okubo, Urawa, Saitama, Japan

    M. Suzuki, K. Hosoi, S. Toyooka & M. Kawahashi

Authors
  1. M. Suzuki
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  2. K. Hosoi
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  3. S. Toyooka
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  4. M. Kawahashi
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Suzuki, M., Hosoi, K., Toyooka, S. et al. White-light speckle method for obtaining an equi-velocity map of a whole flow field. Experiments in Fluids 1, 79–81 (1983). https://doi.org/10.1007/BF00266259

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  • DOI: https://doi.org/10.1007/BF00266259

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