Experimental and numerical investigations of loads on aquaculture nets
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- Institutt for marin teknikk 
This master thesis is to investigate the drag forces on net panels with different twine diameter,material, solidity ratio, and Reynolds number. A series of net panel towing tests has been carriedout. Resistance force on the net panel was measured. The nets have been tested in current onlycondition, wave only condition and current with wave condition with a representative range ofcurrent velocity, wave period and wave steepness. Error and uncertainty in the net panel towingtest are analyzed in detail. Numerical simulations were implemented. The numerical simulationin this thesis is realized in the framework of the open source computational fluid dynamicstoolbox OpenFOAM with version 4.1. The porous media model was proposed to solve the flowcharacteristics through and around a net panel. A variety of net panels with different solidityratio from experiments are applied in the validation case. The porous resistance force was obtainedfromnumerical simulation to comparewith the drag force in current only condition fromexperiments. Satisfactory agreement between simulations and experiments was demonstrated.