Offshore industry

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K-Epsilon provides global aero and hydro solution, powerful tools and customized studies to help the Oil & Gas industry in their new challenges

-Deeper, further, and in more extreme environmental conditions
-Wave induced and vortex induced motionss (VIM) and related problems
-Solving fluid-structure interaction phenomena such as vortex induced viberation (VIV) and galloping

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

Today, K-EPSILON's services help its customers with an accurate prediction of some of the most difficult offshore engineering problems, such as vortex induced vibration (VIV) issues, turret sloshing, vessel to vessel docking configurations, evaluation of current coefficents, platform seakeeping issues...

K-EPSILON is also able to provide Fluid-Structure Interaction (FSI) to model risers, flow lines, mooring system...

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 in a shorter time, resulting in a substantial improvement in performance.

 

Customer references

Few examples .

Seakeeping of FPSO with Moonpool
Unstadeay RANSE computation with free surface in big waves 
K-Epsilon performed few Unsteady RANSE computation with free surface on a FPSO with the moonpool. This study was focus on the behaviour of the free surface in the moopool. A lot of details of the geometry of the moopool was considered, we converged to a half mesh of 25 millions of full hexaedral cells mesh.
Decay test 

Decay test on an offshore Floating Production Storage and Offloading (FPSO).
We realise decay test for several vessels and companies. The methodology and the results waervalidate with experimental. results with a very good agreement..
The impose and roll angle of the hull and we drop in two degrees of freedom (heavec and roll). The time step is adapted to the value of the curent number. 
Sea-Water Riser
Fluid-structure interaction simulation on a flexible sea water riser under an important dynamic depressurization.
Proof concept for the project ETM lead by DCNS.
This problem is solved by K-FSI, a strongly coupled fluid solver (ISIS-CFD of FINE/Marine) and structural solver (K-struct) developed by K-Epsilon.
Riser
Wake structure development behind a cylinder in a forced oscillation motion, to study VIV (vortex-induced vibrations) phenomenon for Total.
This problem is solved by K-FSI, a strongly coupled fluid solver (ISIS-CFD of FINE™/Marine) and structural solver (K-struct) developed by K-Epsilon.
Unsteady rigid motion of towed wing
Unsteady RANSE computation of the CGG's wing
K-Epsilon used K-FSI to simulate the beaviour of the wing towed by the sismic CGG ship. 
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