Open AccessTHE FUNDAMENTAL STUDY TO REDUCE THE SETTLED AREA OF THE FISH AGGREGATION DEVICES ON THE SEA FLOOR THROWN FROM A SHIP
Author(s) -
Yoshiharu Matsumi,
Akira Seyama
Publication year - 1988
Publication title -
proceedings of conference on coastal engineering/proceedings of ... conference on coastal engineering
Language(s) - English
Resource type - Journals
eISSN - 2156-1028
pISSN - 0589-087X
DOI - 10.9753/icce.v21.218
Subject(s) - settling , fish <actinopterygii> , position (finance) , marine engineering , settling time , set (abstract data type) , throwing , computer science , mechanics , environmental science , oceanography , geology , fishery , physics , engineering , classical mechanics , biology , environmental engineering , business , control engineering , finance , step response , programming language
This study aims at clarifying the effective method to set up the fish aggregation device (FAD) thrown down from a ship on the designed position most accurately. The numerical simulation technique is developed to analyzed the behavior of the settling FAD in consideration of the effect of vortices generated behind it. From the systematic calculations for the change of the initial condition on the posture of the FAD at throwing, the effective initial posture of the FAD which reduces the settled area on the sea floor most is investigated. Furthermore, the added-mass coefficient of the settling FAD is numerically analyzed from the kinetic energy of the fluid induced by the settling FAD. The FAD treated in this study is the structure to gather fishes.