Numerical simulations of cavitating water jet by an improved cavitation model of compressible mixture flow with an emphasis on phase change effects

Focusing on cavitation phenomena caused by high-speed submerged water jets, this paper presents an improved model for a compressible fluid mixture based concise estimation of compressibility that considers phase change effects. The homogeneous two-phase flow assumption is adopted, and the gas assumed to consist vapor non-condensable components. Equations state pure liquid ideal are employed evaluate components, treated semi-empirically as constant. embedded in unsteady Reynolds-averaged Navier–Stokes solver, with realizable k-ε eddy viscosity. turbulent cavitating impulsively started jet treated. pattern periodic cloud shedding acceptably captured, mass rate coefficient its fluctuation frequency evaluated simulations agree experimental results well. validity proposed method confirmed. reveal occurs when pin/Pin reaches 0.65 begins pulsate. In well-developed stage, leading subsequent successively shed downstream, process repeated. catches cloud, they coalesce range x/d≈ 2–3. pressure fluctuations concentrate x/d≈2–5 corresponding clouds. pulsates from 0.59–0.66 under effect cavitation.