Impact of inlet gas turbulence on the formation, development and breakup of interfacial waves in a two-phase mixing layer
Impact of inlet gas turbulence on the formation, development and breakup of interfacial waves in a two-phase mixing layer
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入口气体湍流对两相混合层界面波形成、发展和破碎的影响
DOI：
10.1017/jfm.2021.481
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发表时间：
2021
影响因子：
3.7
通讯作者：
Ling, Y.
中科院分区：
文献类型：
--
作者：
Jiang, D.;Ling, Y.
了解气液两相混合层中界面波的发展和破碎对雾化至关重要。由于两股水流之间的速度差，界面上的剪切触发纵向不稳定性，该纵向不稳定性发展为向下游传播的界面波。随着界面波在空间上的增长，横向调制出现，将界面波从准二维转变为完全三维。入口气体湍流强度对界面不稳定性有很大的影响。因此，在本研究中，参数直接数值模拟进行系统的研究的影响，进口气体湍流的界面波的形成，发展和破碎。开源的多相流求解器，巴黎，用于模拟和质量动量一致的流体体积法被用来捕捉尖锐的气液界面。两个计算域的宽度被认为是和宽域将允许详细研究的横向发展的界面波。纵向不稳定性的主频和空间增长率被发现与进口气体湍流强度增加。由瑞利-泰勒不稳定性决定的主导横向波数与纵向频率成比例，因此它也随入口气体湍流强度而增加。液膜中形成的孔洞对界面波的分解起着重要的作用。孔的形成受到入口气体湍流的影响。因此，片材破碎动力学和所形成的液滴的统计也相应地改变。
Understanding the development and breakup of interfacial waves in a two-phase mixing layer between the gas and liquid streams is paramount to atomization. Due to the velocity difference between the two streams, the shear on the interface triggers a longitudinal instability, which develops to interfacial waves that propagate downstream. As the interfacial waves grow spatially, transverse modulations arise, turning the interfacial waves from quasi-two-dimensional to fully three-dimensional. The inlet gas turbulence intensity has a strong impact on the interfacial instability. Therefore, parametric direct numerical simulations are performed in the present study to systematically investigate the effect of the inlet gas turbulence on the formation, development and breakup of the interfacial waves. The open-source multiphase flow solver, PARIS, is used for the simulations and the mass–momentum consistent volume-of-fluid method is used to capture the sharp gas–liquid interfaces. Two computational domain widths are considered and the wide domain will allow a detailed study of the transverse development of the interfacial waves. The dominant frequency and spatial growth rate of the longitudinal instability are found to increase with the inlet gas turbulence intensity. The dominant transverse wavenumber, determined by the Rayleigh–Taylor instability, scales with the longitudinal frequency, so it also increases with the inlet gas turbulence intensity. The holes formed in the liquid sheet are important to the disintegration of the interfacial waves. The hole formation is influenced by the inlet gas turbulence. As a result, the sheet breakup dynamics and the statistics of the droplets formed also change accordingly.
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影响因子：
3.8
作者：
Jiang, Delin;Ling, Yue
通讯作者：
Ling, Yue
气体湍流对空气-水混合层不稳定性的影响。
影响因子：
8.6
作者：
Jean;S. Marty;Mohamed Seydou Dem;A. Cartellier
通讯作者：
A. Cartellier
DOI：
10.1016/j.ijmultiphaseflow.2020.103362
发表时间：
2020-03
期刊：
arXiv: Fluid Dynamics
影响因子：
--
作者：
Bo Zhang;S. Popinet;Y. Ling
通讯作者：
Bo Zhang;S. Popinet;Y. Ling
影响因子：
3.7
作者：
M. Juniper
通讯作者：
M. Juniper
影响因子：
3.7
作者：
G. Agbaglah;R. Chiodi;O. Desjardins
通讯作者：
O. Desjardins