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DOI | 10.1002/2017JD027507 |
Investigation of Turbulent Entrainment-Mixing Processes With a New Particle-Resolved Direct Numerical Simulation Model | |
Gao, Zheng1; Liu, Yangang1,2; Li, Xiaolin1; Lu, Chunsong3 | |
2018-02-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:4页码:2194-2214 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Peoples R China |
英文摘要 | A new particle-resolved three-dimensional direct numerical simulation model is developed that combines Lagrangian droplet tracking with the Eulerian field representation of turbulence near the Kolmogorov microscale. Six numerical experiments are performed to investigate the processes of entrainment of clear air and subsequent mixing with cloudy air and their interactions with cloud microphysics. The experiments are designed to represent different combinations of three configurations of initial cloudy area and two turbulence modes (decaying and forced turbulence). Five existing measures of microphysical homogeneous mixing degree are examined, modified, and compared in terms of their ability as a unifying measure to represent the effect of various entrainment-mixing mechanisms on cloud microphysics. Also examined and compared are the conventional Damkohler number and transition scale number as a dynamical measure of different mixing mechanisms. Relationships between the various microphysical measures and dynamical measures are investigated to search for a unified parameterization of entrainment-mixing processes. The results show that even with the same cloud water fraction, the thermodynamic and microphysical properties are different, especially for the decaying cases. Further analysis confirms that despite the detailed differences in cloud properties among the six simulation scenarios, the variety of turbulent entrainment-mixing mechanisms can be reasonably represented with power law relationships between the microphysical homogeneous mixing degrees and the dynamical measures. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427774500018 |
WOS关键词 | LARGE-EDDY SIMULATION ; CLOUD DROPLET SPECTRA ; CUMULUS CLOUDS ; PREFERENTIAL CONCENTRATION ; ISOTROPIC TURBULENCE ; SIZE DISTRIBUTIONS ; CONVECTIVE CLOUDS ; CONDENSATION ; EVOLUTION ; GROWTH |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33710 |
专题 | 气候变化 |
作者单位 | 1.SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA; 2.Brookhaven Natl Lab, Upton, NY 11973 USA; 3.Nanjing Univ Informat Sci & Technol, Key Lab Aerosol Cloud Precipitat, China Meteorol Adm, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Gao, Zheng,Liu, Yangang,Li, Xiaolin,et al. Investigation of Turbulent Entrainment-Mixing Processes With a New Particle-Resolved Direct Numerical Simulation Model[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(4):2194-2214. |
APA | Gao, Zheng,Liu, Yangang,Li, Xiaolin,&Lu, Chunsong.(2018).Investigation of Turbulent Entrainment-Mixing Processes With a New Particle-Resolved Direct Numerical Simulation Model.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(4),2194-2214. |
MLA | Gao, Zheng,et al."Investigation of Turbulent Entrainment-Mixing Processes With a New Particle-Resolved Direct Numerical Simulation Model".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.4(2018):2194-2214. |
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