The total resistance of a ship’s hull is calculated as the sum of the viscous resistance due to its movement in water, and the wave-making resistance due to the wave pattern that forms on the water’s free surface. Depending on loading conditions a container ship or tanker may travel with different draft and trim values, altering the hull’s wetted area and the wave-making patterns. Therefore, the resistance of the ship’s hull at certain loading conditions varies with its cruising speed.
To ensure minimal fuel consumption, the optimal cruising speed must be evaluated at all possible loading conditions. Obviously, this task requires numerous calculations of the ship’s total resistance at all possible draft, trim and velocity combinations. Optiphore’s work focuses on:
- The construction of the ship’s 3D hull design from its 2D body plan in Catia V5.
- The construction of a computational mesh around the ship and the water free surface and all loading conditions with Hexpress.
- The performance of CFD simulations of flow around a ship’s hull, at all possible draft, trim and velocity combinations on the FINE/Marine software.
- Evaluation of the ship’s effective power at all loading and speed conditions.