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论文类型：期刊论文

发表时间：2018-05-01

发表刊物：TURKISH JOURNAL OF FISHERIES AND AQUATIC SCIENCES

收录刊物：SCIE

卷号：18

期号：5

页面范围：705-716

ISSN号：1303-2712

关键字：Net cage; biofouling; tidal current; flow field; numerical simulation

摘要：The netting of the fish farm, with biofouling or not, was simulated using the porous-media fluid model. The porous coefficients for both clean and biofouled netting were calculated from the drag and lift forces that acts on corresponding clean or biofouled plane net, consequently the relationship between the porous coefficients and the features of the netting as well as the biofouling is established. In this study, both constant and tidal currents through a fish farm, consisting of 2x4 full-scale net cages, were investigated numerically. Effects of cage height, incidence angle of the current and level of biofouling on the netting on the flow field in vicinity region of the fish farm were presented and discussed. Compared with constant current, tidal current produces different flow pattern downstream from the fish farm. Overall, the height of the wake region downstream from the fish farm increases with increasing cage height. The attenuation in flow velocity both inside the net cage and in the wake region increases as the level of biofouling increases. With respect to the incidence angle of the tidal current, the optimal orientation of the fish farm can be determined in certain tidal current from an ecological perspective.