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Method for quantitatively analyzing flow phenomena in annular-mist two-phase flows.

Author(s) : WUJEK S. S., HRNJAK P. S.

Summary

A method has been developed which determines wave speed and wavelength of liquid flows on a tube surface. The features attributed to the surface flows are then removed in order to create an enhanced image of droplets in the focal plane of the camera. The method is described step-by-step and accompanied by resulting images. By knowing the length scale of the image, droplet size is calculated. Knowledge of the length scale and the framing rate of the camera, make it possible to determine the two-dimensional velocity field. Based on the amount of droplets in the enhanced image, an image analysis technique resembling PIV is utilized to determine droplet velocities. The entire analysis technique has been automated allowing the analysis of 500 frames of video in roughly 3 hours. Knowledge of droplet size and velocity can be coupled with an understanding of droplet-film interactions to model droplet deposition.

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Details

  • Original title: Method for quantitatively analyzing flow phenomena in annular-mist two-phase flows.
  • Record ID : 2011-0021
  • Languages: English
  • Publication date: 2010/07/12
  • Source: Source: Proc. 2010 int. Refrig. Air Cond. Conf., Purdue Univ.
    n. 2174; 8 p.; fig.; photogr.; 4 ref.

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