Nuclear Engineering and Technology

  • 제39권4호
  • /
  • Pages.313-326
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  • 2007
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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DEVELOPMENT OF AN ORTHOGONAL DOUBLE-IMAGE PROCESSING ALGORITHM TO MEASURE BUBBLE VOLUME IN A TWO-PHASE FLOW

  • Kim, Seong-Jin (Nuclear thermal hydraulics engineering laboratory, Department of Nuclear Engineering, Seoul National University) ;
  • Park, Goon-Cherl (Nuclear thermal hydraulics engineering laboratory, Department of Nuclear Engineering, Seoul National University)
  • 발행 : 2007.08.31
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초록

In this paper, an algorithm to reconstruct two orthogonal images into a three-dimensional image is developed in order to measure the bubble size and volume in a two-phase boiling flow. The central-active contour model originally proposed by P. $Szczypi\'{n}ski$ and P. Strumillo is modified to reduce the dependence on the initial reference point and to increase the contour stability. The modified model is then applied to the algorithm to extract the object boundary. This improved central contour model could be applied to obscure objects using a variable threshold value. The extracted boundaries from each image are merged into a three-dimensional image through the developed algorithm. It is shown that the object reconstructed using the developed algorithm is very similar or identical to the real object. Various values such as volume and surface area are calculated for the reconstructed images and the developed algorithm is qualitatively verified using real images from rubber clay experiments and quantitatively verified by simulation using imaginary images. Finally, the developed algorithm is applied to measure the size and volume of vapor bubbles condensing in a subcooled boiling flow.

키워드

참고문헌

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피인용 문헌

  1. Vapor Bubbles vol.49, pp.1, 2017, https://doi.org/10.1146/annurev-fluid-010816-060221