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논문 기본 정보

자료유형
학술대회자료
저자정보
Kosuke Hayashi (Kobe University) Akio Tomiyama (Kobe University)
저널정보
한국전산유체공학회 한국전산유체공학회 학술대회논문집 한국전산유체공학회 2012년도 추계학술대회 논문집
발행연도
2012.11
수록면
489 - 496 (8page)

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초록· 키워드

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An interface tracking method based on a level set method for simulating bubbles in clean and contaminated systems is presented. Effects of the numerical treatment of the viscous and surface tension forces on predicted interface motion are investigated. A ghost fluid method is the best for both systems. The harmonic mean of the viscosity for the smeared-out interface method gives good evaluations of viscous stress at the interface. However this method causes large errors if the Marangoni force acts on the interface. The arithmetic mean gives some errors, which can be reduced by increasing the spatial resolution. Numerical simulations of nearly spherical bubbles and a deforming bubble are also carried out. These simulations show that the interface tracking method gives accurate predictions of bubble motion and is of great use in investigation of effects of surfactant on bubble motion. Effects of surfactant on the terminal velocity of a Taylor bubble in low Morton number systems are therefore investigated using the interface tracking method. The numerical results confirm that the reduction of surface tension near the bubble nose is the cause of the increase in terminal velocity of a Taylor bubble at low Eotvos numbers.

목차

Abstract
1. INTRODUCTION
2. EFFECTS OF NUMERICAL TREATMENT OF VISCOUS AND SURFACE TENSION FORCES ON PREDICTED INTERFACT MOTION
3. CLEAN AND CONTAMINATED BUBBLES
4. CONCLUSIONS
ACKNOWLEDGEMENT
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2014-422-000811082