[SimulationLearner]

Hi,

I'm pretty new to Ansys and CFD. I'm trying to run a flow simulation on a 3D cube inside some sort of wind tunnel and trying to find the drag coefficient of the cube.

I've run a few simulations but I haven't gotten the drag coefficient value I was supposed to get.

I believe my problem is with my mesh. I've tried many ways to improve it, but I'm kind of limited by the Ansys software since my license is the free 'student' version. I've attempted to add inflation, but no matter what I do, the software won't let me add inflation.

The inlet velocity is 0.1461 m/s, pressure outlet, with the default air properties of air as Fluent defines it (density = 1.225 kg/m^3, viscosity = 1.7894e-05 kg/(m*s)).

I've tried to add some images using the forum's built-in "insert image" feature, but for some reason, it doesn't upload the photos, so I'm just adding some links to view them:
https://ibb.co/4SDdsXb
https://ibb.co/dr7D8Bz
https://ibb.co/7zRhCz5

Any help will be much appreciated.