IOCAS-IR
An Improved Second-Moment Closure Model for Langmuir Turbulence Conditions: Model Derivation and Validation
Yu, W.1,2; Song, J. B.3; Cao, A. Z.3; Yin, B. S.1,2,4; Guan, S. D.1
2018-12-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
Volume123Issue:12Pages:9010-9037
Corresponding AuthorSong, J. B.(songjb@zju.edu.cn)
AbstractIn this study, an improved second-moment closure model, the so-called k-omega model, which takes into consideration the Langmuir turbulent effect in the transport equations of turbulent kinetic energy and turbulent frequency, was developed. The Langmuir turbulent effect was also included in the vertical eddy viscosity and diffusivity coefficient. Langmuir turbulence production, as well as buoyancy production, anisotropic production, and vorticity production induced by velocity shear, was included in the pressure covariance parameterization to derive the stability function. The Langmuir effect and relatively complete pressure covariance parameterization inclusion can account for the influences of Langmuir turbulence and stratification in the vertical eddy viscosity and vertical eddy diffusion coefficients. Based on the modified model, one-dimensional numerical experiments for horizontally homogeneous flows were carried out. The results indicate that the modified model is more accurate than other models in terms of the vertical eddy viscosity, vertical turbulence velocity variance, kinetic energy, and mean velocity profile compared with the large eddy simulation results. The simulated sea surface temperature (SST) and mixed layer depth of the modified model were compared with observations at Ocean Station Papa. When considering Langmuir turbulent effects, the modified model overcomes the shortcoming that the simulated SST is higher than the observed SST. Numerical results indicate that the k-omega model performs better than the k-kl model, although both models consider the Langmuir turbulent effect in the simulation of upper mixing motions. Plain Language Summary In this work, we obtain a modified k- model which include the Langmuir turbulent effect in the turbulent kinetic energy equation and turbulent frequency transport equation. The modified mixing model by proposed new stability function for the vertical eddy viscosity and diffusivity. The Langmuir turbulence effect and a relatively complete pressure strain covariance parameterization both be taken account to derive new stability functions. And the new model can give reasonable results in the condition mentioned in this article.
Keywordsecond-moment closure model Langmuir turbulence pressure covariance parameterization buoyancy effect turbulent mixing
DOI10.1029/2018JC013878
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC1401404] ; National Key Research and Development Program of China[2017YFA0604102] ; National Natural Science Foundation of China[41576013] ; National Natural Science Foundation of China[41506023] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA11010104]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000456405900021
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/160713
Collection中国科学院海洋研究所
Corresponding AuthorSong, J. B.
Affiliation1.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Zhejiang Univ, Ocean Coll, Zhoushan, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Shandong, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yu, W.,Song, J. B.,Cao, A. Z.,et al. An Improved Second-Moment Closure Model for Langmuir Turbulence Conditions: Model Derivation and Validation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2018,123(12):9010-9037.
APA Yu, W.,Song, J. B.,Cao, A. Z.,Yin, B. S.,&Guan, S. D..(2018).An Improved Second-Moment Closure Model for Langmuir Turbulence Conditions: Model Derivation and Validation.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,123(12),9010-9037.
MLA Yu, W.,et al."An Improved Second-Moment Closure Model for Langmuir Turbulence Conditions: Model Derivation and Validation".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 123.12(2018):9010-9037.
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