Fish Farming
12/02/2025
Simulation of fish grading scale for fishing pen
Simulation and modeling of hydraulic properties of fish grading scale. The Customer is major, world-wide supplier of hardware and services for fish farming industry. The most recent initiative is to replace rectangular sensor for ultrasound fish grading made of steel profiles by new, lighter, more streamlined design less prone to oscillations unders subsea currents. We were responsible for analysis of stability and vibrations of the new structure taking into accound drag, buoyancy, friction on hook and other forces. The challenge was, that CFD/FEA tools were inacessible. The simulation of flow field was performed with on-site developed and implemented panel method based on potential flow theory. With that, velocity on the edge of boundary layer developed on surface of frame profiles has been obtained. Using Pohlhausen method, velocity distributions across boundary layer were evaluated, allowing assessment of shearing and pressure forces on structure. This, coupled with mechanical model of kinematic properties of hooking system has been implemented in Matlab. Time evolution of frame state under current and waves can be thus visualized.
Closed salmon containment system: Watermoon 2.0
The leading Norwegian salmon supplier with a tradition dating back to the 17th century is launching the next generation of its closed-containment, zero-emission aquaculture system, a 72-meter-deep structure housing 200,000 fish. However, its development presents engineering challenges, requiring unprecedented multidisciplinary expertise. We were responsible for range of tasks from concept works of structure's pressure regulation and stabilization system to optimization of fish loading piping and sediment removal tools.
