Compressible effects modeling for turbulent cavitating flow in a small venturi channel: An empirical turbulent eddy viscosity correction

The Reynolds-averaged Naviers-Stokes (RANS) method coupling with cavitation model is still a practical tool to predict cavitating flows, particularly in industrial applications, due its computational efficiency. However, the compressibility effects induced by are not well considered conventional RANS methods, which often causes blockage of reentrant jet and total steadiness simulated cavity. To this end, modeling becomes critical characteristics unsteady flows. An empirical eddy viscosity correction [Reboudet al., “Two phase flow structure cavitation: experiment effects,” 3rd International Symposium on Cavitation CAV1998, Grenoble, France (1998), Vol. 26.] was proposed consider cavitation. Although modification able capture behaviors flows various configurations, it fully analyzed terms turbulent quantities, e.g., Reynolds shear stress. In work, we investigate stress, comparing x-ray experimental data small Venturi channel. It shown that Reboud reduces entire cavity region, improves prediction stress near wall significantly. depends only mixture density, leading poor predictions interface where density has large discrepancies. Based results, propose an limiter confine original beneath layer demonstrate merits measurements.