Abstract
An improved cavitation model and treatment has been developed for the prediction of the flow field resulting from an attached cavitation region. The cavitation model is implemented in a viscous calculation basing on a Reynolds Averaged Navier-Stokes (RANS) equations solver with the effect of turbulence taken into account. A priori knowledge of the wall detachment point and bubble length is not required but naturally a part of the solution by this cavitation model. The liquid/vapor interface is tracked and obtained by an iteration procedure between the flow field computation and interface updating. An improved interface updating technique has been proposed to speed up and stabilize the iteration process. A series of computation has been carried out for internal and external flows of different configurations. The code and the cavitation model have been well validated by comparison of the computations against the experimental data available. The computations also demonstrate the feasibility of the improved cavitation model and treatment to flows in complicated configurations.
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