Numerical Investigation of Cavitation Effects on the Vortex Shedding Behind a Wedge
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To determine the influence of cavitation on the dynamic behavior of alternating vortices shed behind a bluff body with a sharp edge, the realizable k-ε turbulence model coupled with the default Zwart cavitation model from ANSYS Fluent v18.2 have been used to simulate the cavitating and non-cavitating wake flow. The predicted vortex shedding frequencies show a good agreement with experimental measurements. In addition, the numerical results have permitted to assess plausible explanations elucidating the impact of cavitation on the vortex shedding frequency. In summary, a strong correlation between the vorticity dilatation and the change of vortex shedding frequency has been confirmed.