Contribution of wind shear to the entrainment process of the atmospheric convective boundary layer
Contribution of wind shear to the entrainment process of the atmospheric convective boundary layer
复制标题
风切变对大气对流边界层夹带过程的贡献
DOI：
10.3319/tao.2020.02.11.01
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
刘滔
中科院分区：
文献类型：
--
作者：
李岸然;高文峰;刘滔
Wind shear induced by the velocity difference has an important effect on the stably stratified turbulent flow in the atmospheric convective boundary layer (CBL). Cases with different velocity difference are conducted by Large-eddy simulation (LES) to reveal the contribution of shear effect to entrainment. The result shows that the shear-generated turbulent kinetic energy (TKE) in the entrainment layer is partially consumed by the negative buoyancy, which increases the entrainment flux minimum and enhances the entrainment flux ratio in the range of 0.188 0.352. Based on the hypothesis of the independence of the shear-generated TKE and buoyancygenerated TKE, an approach for the fraction of the shear-generated TKE available for entrainment is proposed, and the averaged fraction reaches 38.5%, but the evolution tends to increase with the enlargement of velocity difference. Article history: Received 24 September 2019 Revised 10 December 2019 Accepted 11 February 2020
登录
查看更多内容
影响因子：
3.1
作者：
P. Hildebrand;Bernice Ackerman
通讯作者：
P. Hildebrand;Bernice Ackerman
影响因子：
3.1
作者：
K. Trenberth;Shyh-C. Chen
通讯作者：
K. Trenberth;Shyh-C. Chen
影响因子：
--
作者：
Jianping Huang;X. Lee;E. Patton
通讯作者：
Jianping Huang;X. Lee;E. Patton
影响因子：
3.1
作者：
D. Waliser;K. Lau;Jae-Hoon Kim
通讯作者：
D. Waliser;K. Lau;Jae-Hoon Kim
影响因子：
4.3
作者：
Siyun Kim;Soon-Ung Park;D. Pino;J. Arellano
通讯作者：
Siyun Kim;Soon-Ung Park;D. Pino;J. Arellano