New Methods for Stabilizing Rans Turbulence Models with Application to Large Scale Breaking Waves

Georgios  Azorakos; Bjarke Eltard Larsen; David R. Fuhrman

New Methods for Stabilizing Rans Turbulence Models with Application to Large Scale Breaking Waves

Georgios Azorakos, Bjarke Eltard Larsen, David R. Fuhrman^*

^*Corresponding author for this work

Technical University of Denmark

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Abstract

Recently, Larsen and Fuhrman (2018) have shown that seemingly all commonly used (both k-ω and k-ε variants) two-equation RANS turbulence closure models are unconditionally unstable in the potential flow beneath surface waε use of a modified eddy viscosity. In the present work, three new formally-stable k–ω turbulence model formulations are derived and tested in CFD simulations involving the flow and dynamics beneath large-scale plunging breaking waves, based on experiments of van der A et al. (2017).

Original language	English
Publication date	2020
Number of pages	1
Publication status	Published - 2020
Event	Virtual International Conference on Coastal Engineering (VICCE 2020) - Virtual event Duration: 6 Oct 2020 → 9 Oct 2020

Conference

Conference	Virtual International Conference on Coastal Engineering (VICCE 2020)
Location	Virtual event
Period	06/10/2020 → 09/10/2020

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@conference{88cc19fd3981411382c88b826b392692,

title = "New Methods for Stabilizing Rans Turbulence Models with Application to Large Scale Breaking Waves",

abstract = "Recently, Larsen and Fuhrman (2018) have shown that seemingly all commonly used (both k-ω and k-ε variants) two-equation RANS turbulence closure models are unconditionally unstable in the potential flow beneath surface waε use of a modified eddy viscosity. In the present work, three new formally-stable k–ω turbulence model formulations are derived and tested in CFD simulations involving the flow and dynamics beneath large-scale plunging breaking waves, based on experiments of van der A et al. (2017).",

author = "Georgios Azorakos and Larsen, {Bjarke Eltard} and Fuhrman, {David R.}",

year = "2020",

language = "English",

note = "Virtual International Conference on Coastal Engineering (VICCE 2020) ; Conference date: 06-10-2020 Through 09-10-2020",

}

TY - ABST

T1 - New Methods for Stabilizing Rans Turbulence Models with Application to Large Scale Breaking Waves

AU - Azorakos, Georgios

AU - Larsen, Bjarke Eltard

AU - Fuhrman, David R.

PY - 2020

Y1 - 2020

N2 - Recently, Larsen and Fuhrman (2018) have shown that seemingly all commonly used (both k-ω and k-ε variants) two-equation RANS turbulence closure models are unconditionally unstable in the potential flow beneath surface waε use of a modified eddy viscosity. In the present work, three new formally-stable k–ω turbulence model formulations are derived and tested in CFD simulations involving the flow and dynamics beneath large-scale plunging breaking waves, based on experiments of van der A et al. (2017).

AB - Recently, Larsen and Fuhrman (2018) have shown that seemingly all commonly used (both k-ω and k-ε variants) two-equation RANS turbulence closure models are unconditionally unstable in the potential flow beneath surface waε use of a modified eddy viscosity. In the present work, three new formally-stable k–ω turbulence model formulations are derived and tested in CFD simulations involving the flow and dynamics beneath large-scale plunging breaking waves, based on experiments of van der A et al. (2017).

M3 - Conference abstract for conference

T2 - Virtual International Conference on Coastal Engineering (VICCE 2020)

Y2 - 6 October 2020 through 9 October 2020

ER -

New Methods for Stabilizing Rans Turbulence Models with Application to Large Scale Breaking Waves

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