Shipbuilding & naval

The K-EPSILON solution provides global aerodynamics and hydrodynamics, powerful tools and customized studies to reduce the cost and accelerate the development of new classes of ship in their new challenges:

- Simulating turbulent flow around ship hulls
- Simulating behavior in waves for seakeeping and slamming
- Modeling of cavitating propellers
- Addressing tank sloshing problems

Computational fluid dynamics (CFD) is a powerful marine design tool capable of accurately predicting complex flow phenomena. A key advantage is its ability to model the complex and arbitrary geometries that are typical of real-world equipment.

Today, K-EPSILON's services help our customers to accurately predict some of the most difficult marine engineering problems. Simulation provides engineers with the ability to accurately determine the performance of design concepts, reducing the need for tank test and the building of prototypes. This makes it possible to evaluate many more designs, resulting in a substantial improvement in performance. At the same time, the lower cost and shorter lead-times of simulation provide faster time to market and reduced development costs. When you also consider that CFD simulation provides more design data than tank test, you end up with an unbeatable proposition for its use in marine research and design.

Customer references

Few examples .

V.A.P. from ADV Propulse

Unsteady RANSE computation on a vertical axis propulsor
K-Epsilon realized 2D and 3D computation on the vertical axes propulsor of the company ADV Propulse.

Seakeeping of a vessel

CFD RANSE computation for Bureau Mauric
This unsteady computation was done to compute the added resistance value in head seas.

Calm water resistance computation on a high speed vessel

RANSE computation with free surface.
We realize for CMN hydrodynamic RANSE computations with the free surface on a high speed planing vessel. The vessel trim and sinkage are solved for. .

Self-propulsion for a fishing vessel

Propeller induced vibration analysis for Ship-ST
Ship-ST contacted K-EPSILON for an existing fishing vessel with a severe propeller vibration problem. K-EPSILON analyzed the original 3-bladed propeller and propeller apperature configuration. The analysis indicated that a 4-bladed propeller with a more open propeller aperature would be more approiate for the vessel's wake. The new design reduced vibration by almost 30% compared to the original configuration..

Unsteady RANSE computation on propeller

Propeller open water curves
Accurate knowledge of the thrust, torque and efficiency curves of a propeller design are critical to its successful use with a vessel. K-EPSILON in collaboration with the propeller manufacturer France Hélice developed and validated a workflow to enable rapidly and economically generating the open water performance curves of new propeller designs using RANSE CFD..

Hull resistance in 2 D.O.F

Quasi-static RANSE Computation in 2.D.O.F.

Hydroelastic slamming on prismatic hullforms with FSI

Slamming behavior of flexible prismatic hullforms
For vessels designed for extreme weather conditions, slamming is a distinct possibility. The extreme pressures applied to the hull can quickly lead to fatigue damage or even catastrophic failure. The need for strong vessel performance requires that the structure not be unduly conservative (heavy). Damen contacted K-EPSILON to run true hydroelastic slamming computations with K-FSI to allow them to validate an in-house slamming prediction design tool. K-EPSILON performed a wide range of load cases with both fully rigid and deformable hullforms to provide the necessary data for Damen to calibrate their design tool.