In this work, we investigated cavitation around two kinds of 3D cavitators, disk and conical cavitators, over a wide range of cavitation numbers. Dynamic and unsteady behaviors of cavitation is simulated under the framework of the OpenFOAM. The volume of fluid (VOF) method is applied to track the interface of liquid and vapor phases. The main innovation in this work is providing a detailed comparison of two kinds of turbulence models; LES, k-ω SST and two different types of mass transfer models; Kunz and Sauer. Discussions on the boundary layer separation, re-entrant jet behavior, cavity cloud shape/length and diameter, streamline vortices, pressure/volume fraction and velocity contours in very low cavitation numbers are reported. Our numerical results are compared with the experimental data and a wide set of analytical relations for the cavity characteristics that suitable accuracy was observed. Our results indicate that the most accurate solutions could be obtained if we employ LES turbulence modeling with the Kunz mass transfer model.

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