Accurate level set method for simulations of liquid atomization

doi:10.1016/j.cjche.2014.07.004

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (4): 597-604.DOI: 10.1016/j.cjche.2014.07.004

• 流体力学与传递现象 • 下一篇

Accurate level set method for simulations of liquid atomization

Changxiao Shao, Kun Luo, Jianshan Yang, Song Chen, Jianren Fan

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

收稿日期:2013-11-25 修回日期:2014-07-10 出版日期:2015-04-28 发布日期:2015-05-13
通讯作者: Kun Luo
基金资助:
Supported by the National Natural Science Foundation of China (51176170,51276163) and the Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholars (LR12E06001).This work is also partially supported by the Fundamental Research Funds for the Central Universities.

Accurate level set method for simulations of liquid atomization

Changxiao Shao, Kun Luo, Jianshan Yang, Song Chen, Jianren Fan

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Received:2013-11-25 Revised:2014-07-10 Online:2015-04-28 Published:2015-05-13
Contact: Kun Luo
Supported by:
Supported by the National Natural Science Foundation of China (51176170,51276163) and the Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholars (LR12E06001).This work is also partially supported by the Fundamental Research Funds for the Central Universities.

摘要/Abstract

摘要： Computational fluid dynamics is an efficient numerical approach for spray atomization study, but it is challenging to accurately capture the gas-liquid interface. In this work, an accurate conservative level set method is introduced to accurately track the gas-liquid interfaces in liquid atomization. To validate the capability of this method, binary drop collision and drop impacting on liquid film are investigated. The results are in good agreement with experiment observations. In addition, primary atomization (swirling sheet atomization) is studied using this method. To the swirling sheet atomization, it is found that Rayleigh-Taylor instability in the azimuthal direction causes the primary breakup of liquid sheet and complex vortex structures are clustered around the rim of the liquid sheet. The effects of central gas velocity and liquid-gas density ratio on atomization are also investigated. This work lays a solid foundation for further studying the mechanism of spray atomization.

关键词: Computational fluid dynamics, Level set method, Spray atomization, Interface capture, Breakup

Abstract: Computational fluid dynamics is an efficient numerical approach for spray atomization study, but it is challenging to accurately capture the gas-liquid interface. In this work, an accurate conservative level set method is introduced to accurately track the gas-liquid interfaces in liquid atomization. To validate the capability of this method, binary drop collision and drop impacting on liquid film are investigated. The results are in good agreement with experiment observations. In addition, primary atomization (swirling sheet atomization) is studied using this method. To the swirling sheet atomization, it is found that Rayleigh-Taylor instability in the azimuthal direction causes the primary breakup of liquid sheet and complex vortex structures are clustered around the rim of the liquid sheet. The effects of central gas velocity and liquid-gas density ratio on atomization are also investigated. This work lays a solid foundation for further studying the mechanism of spray atomization.

Key words: Computational fluid dynamics, Level set method, Spray atomization, Interface capture, Breakup

Changxiao Shao, Kun Luo, Jianshan Yang, Song Chen, Jianren Fan. Accurate level set method for simulations of liquid atomization[J]. Chinese Journal of Chemical Engineering, 2015, 23(4): 597-604.

Changxiao Shao, Kun Luo, Jianshan Yang, Song Chen, Jianren Fan. Accurate level set method for simulations of liquid atomization[J]. Chin.J.Chem.Eng., 2015, 23(4): 597-604.

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Accurate level set method for simulations of liquid atomization

Accurate level set method for simulations of liquid atomization

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