I was trying to simulate the flow of air over the generic Ahmed Body and validating with the experimental data for the same Reynolds number (2.8 mil). For a element count of approx. 3.5 mil, the drag coefficient is around 0.49, however the experimental data shows a drag coefficient of around 0.29. This seemed to be a large difference for a 3.5 million mesh. I am using the k-w SST model as the turbulence model. Can anyone give me some advice on what I may be doing wrong?
I am trying to simulate this case on the STARCCM+ software and I was also happening to use the study which you have referred to above as the verification case for my study. Except for the mesh count all the other settings are the same for the simulation that I’m doing. My doubt is will it cause such a major difference in the drag value or am I missing out something important?
Dear @akarshshtt8, if you still have issues, please share the public project, as there are many things that could be looked at. Just to start, the number of elements is not as important as the way they are distributed in the domain.