Hi,
From your description it sounds like you are trying to run an incompressible simulation having 2 volumes in the CAD: a flow region and the solid nose cone. Running incompressible simulations with solid parts does not work, so you would need to delete the nose cone after generating the flow region.
Such workflow is explored in various tutorials:
- Tutorial: Incompressible Flow around a Formula Student Car
- Aerodynamic Flow Behavior Around a Vehicle Tutorial | SimScale
- Incompressible Turbulent Flow Around a Spoiler | SimScale
PS: make sure to review the direction of your velocity inlet and moving wall boundary conditions. The velocity vector is pointing in the wrong direction.
Cheers