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首页> 外文期刊>Turkish Journal of Fisheries & Aquatic Sciences >Numerical Study on the Flow Field Around a Fish Farm in Tidal Current
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Numerical Study on the Flow Field Around a Fish Farm in Tidal Current

机译：潮流中鱼场周围流场的数值研究

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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 2×4 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.
机译：使用多孔介质流体模型模拟了有无生物污染的养鱼场网。从作用在相应的清洁或生物污染的平面网上的阻力和升力计算出清洁和生物污染网的多孔系数，因此，建立了多孔系数与网的特征以及生物污染之间的关系。在这项研究中，对由2×4满刻度网箱组成的养鱼场的恒定和潮流进行了数值研究。提出并讨论了网箱高度，水流入射角和生物污损程度对渔场附近区域流场中网的影响。与恒定电流相比，潮流在养鱼场下游产生了不同的流型。总体而言，养鱼场下游尾流区的高度随着网箱高度的增加而增加。随着生物污损水平的增加，网箱内部和尾流区域的流速衰减都增加。关于潮流的入射角，可以从生态学角度确定在一定潮流中鱼场的最佳方位。

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