Analytical and experimental investigation of drag on nets of fish cages

Zhan, Jie-Min; Jia, Xiang-Yang; Li, Yok Sheung; Sun, Minghao; Genxi, Guo; Hu, Yuxiao

doi:10.1016/j.aquaeng.2005.08.013

Cited by 104 publications

(67 citation statements)

References 6 publications

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“…The results is shown in Fig. 23 for current flow through circular fish cages in Zhan et al (2006). The case setup has been illustrated in detail in in Section 6.3.…”

Section: Sensitivity Analysis On Porous Resistance Coefficientsmentioning

confidence: 98%

“…However, for cases with U ∞ = 0.75 m/s and U ∞ = 1 m/s at θ = 30 • , the relative errors reach 30%. Zhan et al (2006) also conducted experiments on circular fish cage in steady current, and the numerical model was also validated against this set of experiments. The purpose is to examine the performance of the numerical model for more complex flows.…”

Section: Current Interaction With Plane Net Panel: Validation Casementioning

confidence: 99%

“…In order to cover wider range of different net panels, we selected the experiments performed in Zhan et al (2006) Totally three kinds of net panels with different solidity ratios were studied in the experiments. The mesh for all the three nets were square diamond pattern.…”

Section: Current Interaction With Plane Net Panel: Validation Casementioning

confidence: 99%

“…In Section 5, preliminary tests are run for the general setup and convergence analysis of the numerical model, while in Section 6 extensive validation cases are performed against laboratory tests. Series of experiments conducted in Patursson (2007), Zhan et al (2006), Lader et al (2007a) and Lader et al (2007b) are reproduced by the numerical model to examine its accuracy and performance. Furthermore, sensitivity analysis is performed to test the influences of uncertainties in calculation of the porous resistance coefficients in Section 7.…”

Section: Introductionmentioning

confidence: 99%

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Investigations on the porous resistance coefficients for fishing net structures

Chen

Christensen

2016

Journal of Fluids and Structures

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The porous media model has been successfully applied to numerical simulation of current and wave interaction with traditional permeable coastal structures such as breakwaters. Recently this model was employed to simulate flow through and around fishing net structures, where the unknown porous resistance coefficients were adjusted by fitting the available experimental data. In the present paper, a new approach was proposed to calculate the porous resistance coefficients based on the transformation of Morison type load model. The transformation follows the principle that the total forces acting on a net panel from Morison type load model should be equal to the forces obtained from the porous media model. In order to account for the interaction effects in-between the twines, two coefficients were introduced, and they were calibrated by minimizing the least square error function. Extensive validation cases were carried out to examine the performance of the numerical model. This includes steady current flow through plane net panels and circular fish cages, and wave interaction with plane net panels. A variety of fishing nets with different solidity ratios were used in the validation cases, from which it was seen that the overall agreement between the numerical and experimental results is fair.

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“…The results is shown in Fig. 23 for current flow through circular fish cages in Zhan et al (2006). The case setup has been illustrated in detail in in Section 6.3.…”

Section: Sensitivity Analysis On Porous Resistance Coefficientsmentioning

confidence: 98%

Section: Current Interaction With Plane Net Panel: Validation Casementioning

confidence: 99%

Section: Current Interaction With Plane Net Panel: Validation Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigations on the porous resistance coefficients for fishing net structures

Chen

Christensen

2016

Journal of Fluids and Structures

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“…where u 0 is the incoming velocity and C d and C l are coefficients that can be calculated by empirical formulas proposed by Tsukrov et al (2011), Balash et al (2009), Zhan et al (2006, Aarsnes et al (1990), etc. Since there exists a certain reduction in flow velocity through the porous media, an approximate calculation for u in Eqs.…”

Section: Determination Of Porous Coefficientsmentioning

confidence: 99%

Numerical study on the hydrodynamic characteristics of biofouled full-scale net cage

Zhao

Dong

2015

China Ocean Eng

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The effect of biofouling on the hydrodynamic characteristics of the net cage is of particular interest as biofouled nettings can significantly reduce flow of well-oxygenated water reaching the stocked fish. For computational efficiency, the porous-media fluid model is proposed to simulate flow through the biofouled plane net and full-scale net cage. The porous coefficients of the porous-media fluid model can be determined from the quadratic-function relationship between the hydrodynamic forces on a plane net and the flow velocity using the least squares method. In this study, drag forces on and flow fields around five plane nets with different levels of biofouling are calculated by use of the proposed model. The numerical results are compared with the experimental data of Swift et al. (2006) and the effectiveness of the numerical model is presented. On that basis, flow through full-scale net cages with the same level of biofouling as the tested plane nets are modeled. The flow fields inside and around biofouled net cages are analyzed and the drag force acting on a net cage is estimated by a control volume analysis method. According to the numerical results, empirical formulas of reduction in flow velocity and load on a net cage are derived as function of drag coefficient of the corresponding biofouled netting.

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Two-dimensional numerical simulation of flow around three-stranded rope

Wang

Huang

et al. 2016

J. Ocean Univ. China

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Analytical and experimental investigation of drag on nets of fish cages

Cited by 104 publications

References 6 publications

Investigations on the porous resistance coefficients for fishing net structures

Investigations on the porous resistance coefficients for fishing net structures

Numerical study on the hydrodynamic characteristics of biofouled full-scale net cage

Two-dimensional numerical simulation of flow around three-stranded rope

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