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Convective instability-induced mixing and its parameterization using large eddy simulation
Gao, Xiaoqian1; Dong, Changming; Liang, Junhong3; Yang, Jingsong1; Li, Guojing4; Wang, Dongxiao4; McWilliams, James C.
Source PublicationOCEAN MODELLING
AbstractA large eddy simulation (LES) model is applied to study convective instability processes driven by hydrothermal exhalations. The process of convective mixing induced by a bottom heating source is examined in a stratified and rotating frame. The control case of numerical experiment is configured with the horizontal and vertical resolution 5 m located at 35 degrees S. Its results show that the three-dimensional structure of the hydrothermal plume displays an umbrella shape. A strong clockwise vortex above the vent is present and the axis of the vortex is tilted with organized precession. A series of numerical experiments are conducted to test the sensitivity of three characteristic parameters (eddy viscosity (K), maximum plume rise height (Z(max)) and the intensity of the vortex (I-vortex)) to three variables: heat flux from the vent (HF), rotation rate (f) and background stratification (N). Based on the sensitivity experiments, parameterizations of eddy viscosity and maximum plume rise height with respect to HF, f and N are obtained.
KeywordConvective mixing Large eddy simulation Hydrothermal plume Parameterization
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Document Type期刊论文
Affiliation1.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Ocean Modeling & Observat Lab, Nanjing 210044, Jiangsu, Peoples R China
2.Second Inst Oceanog, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China
3.Dong, Changming; McWilliams, James C.] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA
4.Louisiana State Univ, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA
5.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Gao, Xiaoqian,Dong, Changming,Liang, Junhong,et al. Convective instability-induced mixing and its parameterization using large eddy simulation[J]. OCEAN MODELLING,2019,137:40, 51.
APA Gao, Xiaoqian.,Dong, Changming.,Liang, Junhong.,Yang, Jingsong.,Li, Guojing.,...&McWilliams, James C..(2019).Convective instability-induced mixing and its parameterization using large eddy simulation.OCEAN MODELLING,137,40.
MLA Gao, Xiaoqian,et al."Convective instability-induced mixing and its parameterization using large eddy simulation".OCEAN MODELLING 137(2019):40.
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