Turbulent Characteristics of the Stratified Flow in the Braided River with Two Symmetrical Anabranches

Abstract:

The turbulent characteristics of stratified shear flow in braided rivers have not been known until now. The physical model experiment was conducted to study the turbulence kinetic energy distribution of stratified shear flow in the typical braided rivers with a mid-bar between two symmetrical anabranches. Firstly, the distributions of depth-averaged turbulence intensity components in different sections of the anabranch were analyzed. The turbulent intensity peak occurs at the boundary of the separation zone near outer bank and the high velocity zone near inner bank in the entrance region of the anabranch. In the outlet section of the anabranch, turbulent intensity increased at the inner bank. Secondarily, Lateral-averaged turbulence intensity components were compared between different sections. There was obvious high turbulence appearing at the interface of hot and cold water in the inlet section of the anabranch. Finally, the distributions of total turbulence intensity were analyzed by the sectional contours.

• Periodical: Advanced Materials Research (Volumes 732-733)
• Pages: 457-461
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.732-733.457
• Online since: August 2013
• Authors: Li Gu, Hui Hui, Zu Lin Hua, Qiu Lan Li, Zi Nan Jiao, Ming Yan
• Keywords: Braided River, High Turbulence Zone, Stratified Shear Flow, Turbulent Intensity

References

[1] A. Tominaga, I. Nezu, K. Ezaki, H. Nakagawa: Journal of Hydraulic Research Vol. 27 (1989), p.149.

[2] A. Tominaga, I. Nezu: Journal of Hydraulic Engineering Vol. 117 (1991), p.24.

[3] K. Shiono, D. W. Knight: Journal of Fluid Mechanics Vol. 222 (1991), p.617.

[4] K. Blanckaert, H.J De Vriend: Journal of Fluid Mechanics Vol. 536 (2005), p.27.

[5] Jinyou Lu, Haitao Xu, Shimi Yao: Journal of Hydraulic Engineering Vol. 36 (2005), p.1029. "in Chinese".

[6] Yueqin Liu, Yanchu Wan: Journal of South China University of Technology (Natural Science Edition) Vol. 31 (2003), p.89. "in Chinese".

[7] Fan Yang, Huiquan Chen, Jun Guo: Journal of China Institute of Water Resources and Hydropower Research Vol. 4 (2006), p.264. "in Chinese".

[8] Weidong Guo, Yang Zhou, Yue Liang, Yahui Feng: Water Resources and Power Vol. 23 (2005), p.70. "in Chinese".

[9] Yanmin Cao, Huaqing Zhang, Changbo Jiang, Wangsheng Li: Journal of hydrodynamics, A Vol. 23 (2008), p.560. "in Chinese".

[10] Zhiwei Li, Zhongdong Qian, Wenxi Huai: Engineering Journal of Wuhan University Vol. 42 (2009), p.691. "in Chinese".

[11] Shengqi Lu, Hongwu Tang, Ji Yan: Advances in Science and Technology of Water Resources Vol. 27 (2007), p.64. "in Chinese".

[12] Li Gu, Zulin Hua, Kejian Chu, Xiaodong Liu: Journal of Hohai University (Natural Science Edition) Vol. 39 (2011), p.475. "in Chinese".

[13] Kejian Chu, Zulin Hua, Huimin Wang, Linghang Xing, Hongxing Zhang: Advances in Water Science Vol. 16 (2005), p.13. "in Chinese".

[14] Zulin Hua, Kejian Chu, Linghang Xing: Advances in Water Science Vol. 16 (2005), p.203. "in Chinese".