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Theoretical And Experimental Investigation on The Effect of Sinker Tube Geometry on Hydrodynamic Behavior of The Floating Fish Cage in Waves and Current

Tavakoli, Shahin | 2024

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56958 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Tabeshpour, Mohamad Reza
  7. Abstract:
  8. This study was conducted to investigate a theoretical and experimental two-dimensional model of a floating fish cage in regular waves and uniform current. Due to the inefficiency of computational fluid dynamics (CFD) in solving such problems, developing a simple model to predict the results is highly advantageous. In this study, a simple mass-spring model was developed to simulate the problem. After validating the results of this simple model through a series of model tests in a wave tank, it was further utilized to extract additional results. Experiments were conducted at six different wave heights and four current velocities. In all experiments, wave steepness was maintained at a ratio of 1:14. The experiments were categorized into three different groups. In the first category, only the effect of current on the deformation of the cage and the resulting drag force on the model were investigated. In the second category of experiments, only the effect of waves on the model was examined, revealing significant changes in the net shape that were classified and analyzed. In the third category of experiments, the simultaneous effect of waves and current on the model was observed. Various forms of netting deformation were observed in the basin and accurately predicted by the modeling. Phenomena such as floater slamming and wave overtopping on the floater were also observed. Furthermore, changes in the geometry of the sinker were investigated, and their effect on the hydrodynamic behavior of the two-dimensional floating cage model was examined. The results indicated that the developed theoretical model performed well in predicting results and could be used for the analysis of floating fish cages. Various behaviors of cage components under different loading conditions were also observed and discussed
  9. Keywords:
  10. Hydrodynamics ; Water Flow ; Floating Fish Cage ; Netting Slack ; Regular Waves ; Hydrodynamic Behaivoir

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