This paper reports an uncertainty analysis of quantitative visualization methodology for slug bubble dynamics in downward-facing nucleate boiling condition. Measurement of dynamics of slug bubble, i.e. departing speed, frequency, and diameter, is very important to predict safety margin of thermal systems in moving vehicle. By employing high speed visualization and post-processing, we quantitatively measured the volume and location of slug bubble, so that vapor generation rate and departing speed data were derived from their time differentiation. As a visualization methodology, its reliability was evaluated via uncertainty analysis. For 95% confidence interval, uncertainty of vapor generation rate and departing speed were 3% and 2%, respectively, and which were one order lower than standard deviation of those data.

ABSTRACT
1. 서 론
2. 실 험
    2.1 실험장치 및 실험수행방법
    2.2 가시화 및 후처리 방법
3. 불확정성 해석
4. 실험결과 및 토의
5. 결 론
References

• 김지민(Dept. of Technology Education, Korea National University of Education) | Ji-Min Kim Corresponding Author