A SOLUTION TO THE OVER-PRODUCTION OF TURBULENCE BENEATH SURFACE WAVES IN RANS MODELS

David R. Fuhrman; Bjarke Eltard Larsen

doi:10.9753/icce.v36.waves.33

No. 36 (2018), Waves

No. 36 (2018)

A SOLUTION TO THE OVER-PRODUCTION OF TURBULENCE BENEATH SURFACE WAVES IN RANS MODELS

Waves

Published 2018-12-30

David R. Fuhrman
Bjarke Eltard Larsen

David R. Fuhrman

Bjarke Eltard Larsen

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A SOLUTION TO THE OVER-PRODUCTION OF TURBULENCE BENEATH SURFACE WAVES IN RANS MODELS. (2018). Coastal Engineering Proceedings, 1(36), waves.33. https://doi.org/10.9753/icce.v36.waves.33

Abstract

CFD simulations of breaking waves with RANS models over the past 20 years have shown a marked tendency to severely over-predict turbulence levels, both outside and within the surf zone. The reason is most likely due to the inherent instability of turbulence closure models, as originally diagnosed by Mayer & Madsen (2000). While they proposed an ad-hoc fix, a fundamentally sound solution to this wide-spread problem has, to date, eluded the coastal and ocean engineering modeling community.

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References

Larsen, B.E. & Fuhrman, D.R. (2018) On the over-production of turbulence beneath surface waves in RANS models. J. Fluid Mech. (in revision).

Mayer, S. & Madsen, P.A. (2000). Simulation of breaking waves in the surf zone using a Navier-Stokes solver. In: Proc. 25th ICCE. Sydney, Australia, pp. 928-941.

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A SOLUTION TO THE OVER-PRODUCTION OF TURBULENCE BENEATH SURFACE WAVES IN RANS MODELS

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