—Artificial reefs have been constructed throughout the world, but there is no uniform method to assess the influence range of artificial reef. The physical influence on surrounding flow of artificial reef can be mainly represented by three kinds of flow pattern including upwelling current, wake flow and back eddy. In this paper we compare three different methods, based on influence length, influence area, and influence volume, to find out an effective method to indicate the impact effect of the artificial reef. The numerical method of renormalization group k-ε turbulence model is used to calculate the characteristics of the flow field around four kinds of artificial reefs and the above three kinds of assessment methods are applied to compare the flow field. The results show that: 1. The influence volume is better than the other two in general; 2. Influence area and length can be a misjudgment sometimes especially when the artificial reef is asymmetric; 3. Influence area is a better way to show the diversity of wake flow; 4. Influence length cannot reflect the back eddy. It is recommended to use the influence volume as the main measurement assessing the influence range of artificial reef. Meanwhile, the influence area may be a good indicator to assess the wake flow and the influence length just be a simple comparison.
—Numerical simulation, assess method, influence length, influence area, influence volume.
Huang Luiyi, Cheng Hui, Tang Yanli, and Wang Xinxin are with the Ocean University of China, Qingdao, 266003, China (e-mail: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com).
Yang Qian is with the Tokyo University of Marine Science and Technology, 108-0075, Japan (e-mail: firstname.lastname@example.org).
Cite: Huang Luiyi, Cheng Hui, Tang Yanli, Yang Qian, and Wang Xinxin, "Comparison of Three Ways to Assess the Influence Range of Different Artificial Reefs," International Journal of Engineering and Technology vol. 9, no. 2, pp. 105-110, 2017.