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Computational fluid-dynamics-based analysis of a ball valve performance in the presence of cavitation
, Article Journal of Engineering Thermophysics ; Vol. 23, issue. 1 , January , 2014 , p. 27-38 ; Asadi, M ; Xie, G ; Lorenzini, G ; Biserni, C ; Sharif University of Technology
Abstract
In this paper, the ball valve performance is numerically simulated using an unstructured CFD (Computational Fluid Dynamics) code based on the finite volume method. Navier-Stokes equations in addition to a transport equation for the vapor volume fraction were coupled in the RANS solver. Separation is modeled very well with a modification of turbulent viscosity. The results of CFD calculations of flow through a ball valve, based on the concept of experimental data, are described and analyzed. Comparison of the flow pattern at several opening angles is investigated. Pressure drop behind the ball valve and formation of the vortex flow downstream the valve section are also discussed. As the...