Analysis of vortexes in sliding gate valves by using computational fluid dynamics

In this study, the occurrence of the vortexes and their distributions nearby the sliding gate valves have been investigated and the effect of vibration, pressure, drag force, and lift forces were analyzed. For this reason, a sliding valve with the help of computational fluid dynamics (CFD) software was simulated in two-dimensional (۲D(, where the flow and turbulence equations were solved for three different valve opening (full, half, and ۱۶.۷ %) models. To analyze the instability of the fluid motion under the slidingvalves, Navier-Stokes Equations were used to calculate the turbulence by applying the Boundary Layer Theory. The variety of vortexes formed within the vicinity of the valve structure was investigated based on time, where the trend of fluctuations and their occurrence regions have been detected. From the gathered solution dataset of the numerical simulations, the pressure coefficient (CP), the lift force coefficient (CL), the drag force coefficient (CD) and the momentum coefficient due to hydrodynamicforces (CM) were examined and relevant figures were generated from these results, the vortex-induced vibrations were analyzed.

Keywords:

induced vibrations , computational fluid dynamics , sliding gate valves , vortexes.