한국가시화정보학회:학술대회논문집
- 한국가시화정보학회 2002년도 추계학술대회 논문집
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- Pages.7-10
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- 2002
상승하는 단일 버블 이상유동의 PIV 계측을 위한 영상분리기법
Simple Image-Separation Method for Measuring Two-Phase Flow of Freely Rising Single Bubble
초록
A novel two-phase PIV algorithm using a single camera has been proposed, which introduces a method of image-separation into respective phase images, and is applied to freely rising single bubble. Gas bubble, tracer particle and background each have different gray intensity ranges on the same image frame when reflection and dispersion in the phase interface are intrinsically eliminated by optical filters and fluorescent material. Further, the signals of the two phases do not interfere with each other. Gas phase velocities are obtained from the separated bubble image by applying the two-frame PTV. On the other hand, liquid phase velocities are obtained from the tracer particle image by applying the cross-correlation algorithm. Moreover, in order to increase the SNR (signal-to-noise ratio) of the cross-correlation of tracer particle image, image enhancement is employed.
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