NUMERICAL SIMULATION AND EXPERIMENTAL STUDY ON FLOW FIELD OF ARTIFICIAL REEFS IN THREE TUBE-STACKING LAYOUTS
ZHENG Yan-Xuan;LIANG Zhen-Lin;GUAN Chang-Tao;SONG Xie-Fa;LI Jiao;CUI Yong;LI Qiang;SHAN Xiao-Luan;XU Wen-Wen;Ocean University of China,Lab for water environmental engineering of marine biology;Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Key Laboratory of Sustainable Development of Marine Fisheries,Ministry of Agriculture,Carbon-Sink Fisheries Laboratory;Shan Dong University,Weihai,Lab for fisheries engineering;Rushan City Ocean and Fishery Administration;
Stacking forms of fixtures in an artificial reef at seabed affect local flow field. Tubes are widely used for artificial reefs construction in Yellow Sea and Bohai Sea. In order to optimize the function of the reefs, particle image velocimetry and Fluent numerical simulation were applied for analyzing flow fields around reefs built with tubes in three stacking strategies, i.e., single-, triple-, and hexad-tube-stacking layouts at five water flow velocities(4.5, 9.0, 13.5, 18.0, and 22.5cm/s). The results of numerical simulation are consistent with the experimental result in error of 20%. The maximums of upwelling in velocity, height, and area increased with the increment of velocity while the maximum area of vortices varied irregularly. In addition, these maximums increased with the increment of the number of tubes in stack.