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论文类型：期刊论文

发表时间：2013-01-01

发表刊物：AQUACULTURAL ENGINEERING

收录刊物：SCIE、EI

卷号：52

页面范围：1-13

ISSN号：0144-8609

关键字：Gravity cage; Flow field; Porous media model; Numerical simulation

摘要：A three-dimensional (3D) numerical model is established to simulate the flow field inside and around the gravity cages in a current. The realizable k-epsilon turbulence model was chosen to describe the flow, and the governing equations are solved by using the finite volume method. In the numerical model the cylindrical cage is divided into 16 plane nets around the circumference and a bottom net, and the net is modeled using the porous media model. The unknown porous coefficients are determined from the hydrodynamic force on the net under different flow velocities and attack angles using the least squares method. In order to validate the numerical model, the numerical results of the plane nets were compared with the data obtained from two physical model tests. The comparisons show that the numerical results are in good agreement with the experimental data. Using the present model, this paper presents the flow field inside and around the gravity cages with different spacing distances and cage numbers. This study provides information about the flow field inside and around the fishing net cages. (C) 2012 Elsevier B.V. All rights reserved.