© The Author(s) 2015. Published by Science and Education Publishing. Table 3. Errors for different single phase turbulence models for disk angle 40° Model RSM Standard k- Realized Experimental Numerical, 30 32 34 38 24 Error% 25 33 41 58 - Run time(hours) 14 7 8 Mohammed M. Said et al. The Accuracy Degree of CFD Turbulence Models for Butterfly Valve Flow Coefficient Prediction. American Journal of Industrial Engineering, 2016, Vol. 4, No. 1, 14-20. doi:10.12691/ajie-4-1-3 © The Author(s) 2015. Published by Science and Education Publishing.