[Ben_Thomas]

[SIZE="6"]Hello,

I am trying to replicate this study (linked below) at Re=1.3E5 in star CCM+. I have set a rotating reference frame for the wheel (+16rad/s) and a rolling road boundary with relative velocity of +4m/s. An identical air domain with symmetry planes at the top and sides, and no-slip wall on the wheel subtract which sits on the ground plane. The wheel is the same dimensions D=0.5, W=0.2 and inlet velocity is 4m/s, with a pressure outlet at exit. I have 3d physics with Constant Density, Gamma Transition, Gas (air), Gradients, Implicit Unsteady, K-Omega, RANS, Segregated Flow, Solution Interpolation, SST, Turbulence and Wall Distance.

My coefficient reports havs 0 ref pressures, standard air density, 4m/s velocity, 0.1m^2 reference area and are on the wheel. But my lift coefficient is 0.915 and drag coefficient is 0.688 compared to 0.468 and 0.274 in the reference study.

Does anyone have any ideas what I am doing wrong? I've spend almost a hundred hours chasing my tail!



https://pdf.sciencedirectassets.com/...aec10752&cc=gb