Three-dimensional hydrodynamic modelling of tidal flows interacting with aquaculture fish cages

2020 ◽  
Vol 93 ◽  
pp. 102871
Author(s):  
Graham Rickard
Keyword(s):  
Three Dimensional ◽  
Hydrodynamic Modelling ◽  
Tidal Flows ◽  
Aquaculture Fish ◽  
Fish Cages

scholarly journals HYDRODYNAMIC MODELLING OF THE SOUTHERN NORTH SEA

1978 ◽  
Vol 1 (16) ◽  
pp. 65
Author(s):  
David Prandle
Keyword(s):  
North Sea ◽  
Three Dimensional ◽  
Flood Routing ◽  
Hydrodynamic Modelling ◽  
One Dimensional ◽  
Southern North Sea ◽  
Tidal Propagation ◽  
Modelling Studies ◽  
Residual Flows ◽  
Shallow Seas

Numerical modelling of rivers, estuaries and shallow seas has attracted increasing interest over the last two decades. The models have developed from one dimensional (ID) applications to tidal propagation and flood routing through two and, finally, three dimensional applications to motions ranging from "pseudo-turbulence" to annual mean residual flows. The present account describes the development, over the last five years, of the modelling studies carried out by the author concerning the hydrodynamics of the southern North Sea and River Thames. The objective is to identify those major points which have emerged that may have a wider significance.

Benthic foraminiferal response to the removal of aquaculture fish cages in the Gulf of Aqaba-Eilat, Red Sea

2014 ◽  
Vol 107 ◽  
pp. 8-17 ◽  
Author(s):  
Shai Oron ◽  
Dror Angel ◽  
Beverly Goodman-Tchernov ◽  
Gily Merkado ◽  
Moshe Kiflawi ◽  
...  
Keyword(s):  
Red Sea ◽  
Gulf Of Aqaba ◽  
Aquaculture Fish ◽  
Fish Cages

Hydrodynamic interactions on net panel and aquaculture fish cages: A review

2013 ◽  
Vol 58 ◽  
pp. 260-274 ◽  
Author(s):  
Pascal Klebert ◽  
Pål Lader ◽  
Lars Gansel ◽  
Frode Oppedal
Keyword(s):  
Hydrodynamic Interactions ◽  
Aquaculture Fish ◽  
Fish Cages

PIV on Inclined Cylinder Shaped Fish Cages in a Current and the Resulting Flow Field

2008 ◽  
Author(s):  
Astrid Harendza ◽  
Jan Visscher ◽  
Lars Gansel ◽  
Bjo̸rnar Pettersen
Keyword(s):  
Flow Field ◽  
Particle Image ◽  
Three Dimensional ◽  
Structure Change ◽  
Fish Farms ◽  
Three Dimensional Flow ◽  
Towing Tank ◽  
Image Velocimetry ◽  
Fish Cages ◽  
A Current

The present experimental investigation focuses on the flow structure around short free end cylinders with an aspect ratio of L/D = 3 at a Reynolds number of Re = 5000. Cylinders with varying degrees of inclination and porosity were tested in a towing tank, acting as models for fish farm cages. According to studies of fish cages at commercial Norwegian fish farms, the inclination angle of the structure change up to 25 degrees from the vertical when exposed to a current. Cylinders with porosities of 0% and 75% were tested, the latter representing fish cage netting with fouling. To visualize the flow around the cylinders, 2- and 3-Component (2C and 3C) Particle Image Velocimetry (PIV) was used. The effects of inclination and porosity on the three-dimensional flow field will be described and discussed.

scholarly journals A modeling study on tides in the Port of Vancouver

2019 ◽  
Vol 2 (1) ◽  
pp. 101-125 ◽  
Author(s):  
Yongsheng Wu ◽  
Charles Hannah ◽  
Mitchell O’Flaherty-Sproul ◽  
Phillip MacAulay ◽  
Shiliang Shan
Keyword(s):  
Three Dimensional ◽  
Ocean Model ◽  
Tidal Currents ◽  
Momentum Balance ◽  
Tidal Asymmetry ◽  
Residual Circulation ◽  
Dynamic Mechanisms ◽  
Tidal Flows ◽  
Residual Flows ◽  
Good Agreement

In the present paper, tides in the port of Vancouver Harbour have been investigated with a high-resolution three-dimensional hydrodynamic model based on FVCOM (Finite Volume Community Ocean Model). The model was evaluated against field observations including tidal elevations and tidal currents, and the evaluation showed that the model was in good agreement with the observational data. Using the model, we first investigated the horizontal distributions of tides, tidal currents, and tidally induced residual circulation, and then investigated the tidal asymmetry and dynamic mechanisms of tidal flows in the harbour. The tidal residual circulation shows a strong spatial pattern, which is associated with the local coastlines and variation of topography. The tidal asymmetry in the harbour is caused by different mechanisms, not only including the traditional factors, such as residual flows, the interaction between M2 and its overtide M4, but also the interaction of principal astronomical tides of O1, K1, and M2. The momentum balance is dominated by terms of the advection and the pressure gradient in First Narrows and Second Narrows, whereas terms of the local acceleration and the Coriolis are also important in the central harbour. The spatial variations of the momentum terms are strongly associated with the local changes in coastline and topography.

Dynamic Analysis of Aquaculture Fish Cages in Irregular Waves

2013 ◽  
Author(s):  
Li Li ◽  
Shixiao Fu ◽  
Runpei Li
Keyword(s):  
Time History ◽  
Irregular Waves ◽  
Structural Deformation ◽  
Random Waves ◽  
Irregular Wave ◽  
Beam Elements ◽  
Open Sea ◽  
Structural Deformations ◽  
Aquaculture Fish ◽  
Fish Cages

The aquaculture fish cage encounters random waves in the open sea. Understandings of their dynamic behaviors are important for design of the deepwater fish cages. In this paper, the hydrodynamic responses of a gravity-typed fish cage in irregular waves are studied based on FEM and Morison equations. The floating collar and the bottom ring are modeled by beam elements. Net lines are modeled by truss elements. Hydrodynamic forces are calculated by a modified Morison equation taking the relative motion between the fluid and structure members into account. The displacement responses characters (time history and spectrum) of the fish cage floating collar in random waves are investigated. The response results show some similarities between fish cage in regular waves and irregular waves. Both rigid body motions and flexible structural deformations can be seen of the floating collar and the whole fish cage. The net volume changes with time in irregular wave and also high frequency responses caused by the structural deformation are observed.

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