Hydrodynamics
We optimize ship resistance and vessel energy efficiency. Our proprietary Elogrid® product reduces fuel consumption and improves maneuverability.
Hydrodynamic CFD modeling enables optimization of vessel resistance and overall energy efficiency. Since resistance is the primary factor affecting fuel consumption in maritime operations, minimizing it is essential for cost-effective and environmentally sustainable shipping
Flow simulation enables continuous ship development throughout their lifecycle and identifies new opportunities for energy savings. Simulation can also be used to optimize individual components, such as propellers or other propulsion systems, and analyze their impact on the vessel’s overall performance.
Our Elogrid solution helps improve ship energy efficiency. Elogrid is a grid structure individually optimized for each vessel using flow simulation, installed at the openings of bow thruster tunnels. It reduces cavitation in the tunnels and enables better flow to and from the propeller. Research shows that Elogrid reduces fuel consumption by 1-4%. Additionally, Elogrid decreases vessel vibration and noise, improves lateral thrust, and prevents the windmilling effect in thruster tunnels.
The performance of each Elogrid is optimized through flow simulation. Optimization is performed at multiple different operating speeds to identify optimal improvements to the vessel’s performance. Bow thruster thrust is evaluated through bollard pull tests at various towing loads to determine optimal thrust improvements with the lowest vibration and noise levels.
The visualization illustrates flow acceleration and vortex formation between structures and in the wake region. Simulation enables early optimization of design, reduction of drag, and identification of critical flow phenomena.
Services and competencies
- Hull resistance modeling and optimization
- Propeller performance analysis
- Energy efficiency improvements
- Air lubrication
- Hull form optimization
- Elogrid® solution for reducing fuel consumption
- Propulsion system analysis
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Finding the full potential of CFD
CFD, or Computational Fluid Dynamics, is a method that is often utilized only for the post-design phase, although it is very well suited for wider and efficient use throughout the design process. Optimal use of CFD analysis generally shortens projects’ lead times and improves product assessment. It also provides an excellent basis for preparing digital twins. In process modeling tasks, CFD is an excellent tool for studying the components, for example.
Improving ship hull hydrodynamics
Ship hulls are equipped with thrusters that allow lateral ship motion, for example, in harbour manoeuvring. The propellers that induce the force are mounted inside tunnels in the bow section or, in some cases, in the stern section. These tunnels increase ship resistance, which can be reduced with the use of grids set in the openings.
Ship simulation in rough seas
The Elomatic technical analysis team has been developing and testing the methods for ship hydrodynamics simulation in rough seas.
The ships sail most of the time in wave conditions which differ from the specified promised speed test conditions. The calm sea conditions are closer to reality for very big ships, as typical wave conditions and their impact remain relatively small. However, for a ship scale with a length of 100m and under, the wave impact on ship behavior becomes more essential. To design ships of that length and meet real conditions with as high performance as possible, the computational dynamics should be used as much as for calm sea conditions.
Optimizing ship performance: Three ways Elogrid can help you smooth the decarbonization journey.
Ship owners are faced with a multitude of design decisions and uncertainties, including choices regarding solutions for the existing fleet. Despite the challenges ahead, the primary goal remains optimizing the ship’s performance, whether it’s a cruise ship or ferry, superior ship design is the key.