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Instability of the realizable k–ε turbulence model beneath surface waves
2020
Physics of Fluids
Recent research has proved that most widely used two-equation turbulence closure models are unconditionally unstable in regions of nearly potential flow having finite strain, as commonly found beneath non-breaking surface waves. In this work, we extend such analysis to consider the popular realizable k-ε turbulence model. It is proved that this model, unlike all others thus far analyzed, is only conditionally unstable in such regions due to the addition of viscosity in the ε dissipation term. A
doi:10.1063/5.0029206
fatcat:x7tsaf2kdbgldpznh3expgtdju