Effect of Turbulence Parameters on Numerical Simulation of Complex Automotive External Flow Field
Numerical simulations for the Ahmed model with 25° slant angle are performed under three different turbulent parameters, intensity and length scale, intensity and viscosity ratio, k and epsilon. The external flow field of ahmed model with 25° slant angle is got, and all the velocity vectors, pressure distribution and the drag coefficient of the flow field are obtained as well. The comparison between the numerical simulations and the experimental statistics shows that intensity and viscosity and k and epsilon characterized by higher computation accuracy are more suitable for numerical simulation of automotive external flow field.
X. J. Hu et al., "Effect of Turbulence Parameters on Numerical Simulation of Complex Automotive External Flow Field", Applied Mechanics and Materials, Vols. 52-54, pp. 1062-1067, 2011