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April 2019

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Advanced CFD
put to new MRE use

Chantiers de l’Atlantique courtesy
Chantiers de l’Atlantique courtesy

Bureau Veritas Solutions – Marine & Offshore provides solutions for the marine renewable energies market to address challenges such as complex hydrodynamic behavior, structural design and mooring systems thanks to in-house developed software and proven methodologies.

BV Solutions – M&O recently provided its expertise in advanced CFD to study the scouring issues that affect the offshore foundations of offshore wind and tidal turbines. Due to the velocity of the flow at seabed level, sediments around the foundation may be washed away, decreasing stability.

Together with Chantiers de l’Atlantique, BV Solutions – M&O was involved in a research and development project that aims to improve industry understanding of the phenomenon and to find a numerical solution to model it.

Scouring around a circular pile exposed to a steady current in cohensionless sediment, such as sand, was simulated with ICARE. This is a RANSE (Reynolds-averaged Navier-Stokes equations) solver using the finite differences method and is, by consequence, a relatively fast CFD code. The numerical results have been successfully validated using experiment data from reference papers on scouring issues (Roulund et al, 2005).

Further developments are now planned to numerically evaluate several scouring protection systems including mats and riprap to advise clients on the best solution for their challenges.

nicolas.boulet@bvsolutions-m-o.com