Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution

陆宗泽; 樊伟; 李爽; 葛建忠

doi:10.1007/s00343-018-7015-y

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Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution

Physics | Updated：2023-05-19

- Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution
- Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution
- 海洋湖沼学报（英文） 2018年36卷第4期页码：1178-1188
- Affiliations：
  
  1.Ocean College, Zhejiang University, Zhoushan 316000, China
  2.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
- Author bio：
  
  FAN Wei, fanwei@zju.edu.cn
- Funds：
  
  the National Key Research and Development Program of China(2016YFC1401404);the National Key Research and Development Program of China(2017YFA0604102);the National Natural Science Foundation of China(41506015);the National Natural Science Foundation of China(41576013);the Zhejiang Provincial Natural Science Foundation(LY16D060001);the Open Research Fund of the State Key Laboratory of Estuarine and Coastal Research(SKLEC-KF201406)
- DOI：10.1007/s00343-018-7015-y
  中图分类号：
- 收稿：2017-04-07，
  
  录用：2017-6-12，
  
  网络首发：2017-07-13，
  
  纸质出版：2018-07
- Accepted：
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陆宗泽, 樊伟, 李爽, 等. Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution[J]. 海洋湖沼学报（英文）, 2018,36(4):1178-1188.

Zongze LU, Wei FAN, Shuang LI, et al. Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution[J]. Chinese Journal of Oceanology and Limnology, 2018, 36(4): 1178-1188.
陆宗泽, 樊伟, 李爽, 等. Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution[J]. 海洋湖沼学报（英文）, 2018,36(4):1178-1188. DOI： 10.1007/s00343-018-7015-y.

Zongze LU, Wei FAN, Shuang LI, et al. Large-eddy simulation of the influence of a wavy lower boundary on the turbulence kinetic energy budget redistribution[J]. Chinese Journal of Oceanology and Limnology, 2018, 36(4): 1178-1188. DOI： 10.1007/s00343-018-7015-y.

摘要

Abstract

Oceanic turbulence plays an important role in coastal flow. However

as the effect of an uneven lower boundary on the adjacent turbulence is still not well understood

we explore the mechanics of nearshore turbulence with a turbulence-resolving numerical model known as a large-eddy-simulation model for an idealized scenario in a coastal region for which the lower boundary is a solid sinusoidal wave. The numerical simulation demonstrates how the mechanical energy of the current is transferred into local turbulence mixing

and shows the changes in turbulent intensity over the continuous phase change of the lower topography. The strongest turbulent kinetic energy is concentrated above the trough of the wavy surface. The turbulence mixing is mainly generated by the shear forces; the magnitude of shear production has a local maximum over the crest of the seabed topography

and there is an asymmetry in the shear production between the leeward and windward slopes. The numerical results are consistent with results from laboratory experiments. Our analysis provides an important insight into the mechanism of turbulent kinetic energy production and development.

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references

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