Analysis of Flow Characteristics and Effects of Turbulence Models for the Butterfly Valve

In the present study, flow characteristics of butterfly valves with different sizes DN 80 (nominal diameter: 76.2 mm), 262 254 400 406 mm) were numerically investigated under valve opening percentages. Representative two-equation turbulence models k-epsilon model Launder and Sharma, k-omega Wilcox, SST Menter selected. Flow examined to determine effects. It was determined that increasing effect could cause many discrepancies between models, especially in areas large pressure drop velocity increase. addition, sensitivity analysis properties conducted constants used each model. observed most sensitive dissipation rate (Epsilon) for specific (Omega)