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 opening of the valve decreases, the vortices grow and cause higher pressure drop. In other words,more energy is lost due to these growing vortices. In general, the valve opening plays very important roles in the performance of a ball valve.

Computational Fluid-Dynamics-based Analysis of a Ball Valve Performance in Presence of Cavitation / A., Shalchi Tabrizi; M., Asadi; G., Xie; Lorenzini, Giulio; C., Biserni. - In: JOURNAL OF ENGINEERING THERMOPHYSICS. - ISSN 1810-2328. - 23:1(2014), pp. 27-38. [10.1134/S1810232814010044]

Computational Fluid-Dynamics-based Analysis of a Ball Valve Performance in Presence of Cavitation

LORENZINI, Giulio;
2014-01-01

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 opening of the valve decreases, the vortices grow and cause higher pressure drop. In other words,more energy is lost due to these growing vortices. In general, the valve opening plays very important roles in the performance of a ball valve.
2014
Computational Fluid-Dynamics-based Analysis of a Ball Valve Performance in Presence of Cavitation / A., Shalchi Tabrizi; M., Asadi; G., Xie; Lorenzini, Giulio; C., Biserni. - In: JOURNAL OF ENGINEERING THERMOPHYSICS. - ISSN 1810-2328. - 23:1(2014), pp. 27-38. [10.1134/S1810232814010044]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2757745
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 37
  • ???jsp.display-item.citation.isi??? 32
social impact