TY - JOUR
T1 - Modeling volume deformation in gravity-type cages with distributed bottom weights or a rigid tube-sinker
AU - Huang, Chai Cheng
AU - Tang, Hung Jie
AU - Liu, Jin Yuan
N1 - Funding Information:
This work was supported in part by “Aim for the Top University Plan from the Ministry of Education (95C100303),” National Science Council, and the Fisheries Agency, Council of Agriculture of Taiwan, R.O.C. The authors would like to express profound thanks for their financial support.
PY - 2007/9
Y1 - 2007/9
N2 - Fish mortality caused by the shrinkage and deformation of gravity-type cage net volume during typhoons is of great concern to the marine cage aquaculture industry. To remedy this deformation problem, we developed a specially designed tube-sinker to replace the weights that are commonly used at the bottom of cage nets. Herein, we describe the features of our new cage net system, the formation of motion equations, a new approach to estimating the volume reduction coefficient, and physical model tests in a hydrodynamic wave tank. Results of the numerical simulation and the experimental measurements show good agreement. This study indicates that the tube-sinker not only improves the volume reduction coefficient by 10% for most wave conditions, but also that it significantly reduces severe fluctuations in volume deformation, thereby reducing fish fatalities due to skin abrasion with the net.
AB - Fish mortality caused by the shrinkage and deformation of gravity-type cage net volume during typhoons is of great concern to the marine cage aquaculture industry. To remedy this deformation problem, we developed a specially designed tube-sinker to replace the weights that are commonly used at the bottom of cage nets. Herein, we describe the features of our new cage net system, the formation of motion equations, a new approach to estimating the volume reduction coefficient, and physical model tests in a hydrodynamic wave tank. Results of the numerical simulation and the experimental measurements show good agreement. This study indicates that the tube-sinker not only improves the volume reduction coefficient by 10% for most wave conditions, but also that it significantly reduces severe fluctuations in volume deformation, thereby reducing fish fatalities due to skin abrasion with the net.
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U2 - 10.1016/j.aquaeng.2007.04.003
DO - 10.1016/j.aquaeng.2007.04.003
M3 - Article
AN - SCOPUS:34447250736
SN - 0144-8609
VL - 37
SP - 144
EP - 157
JO - Aquacultural Engineering
JF - Aquacultural Engineering
IS - 2
ER -