This library project shows how fast users can set up fluid flow analyses with SimScale. The CAD model was provided by Perrinn Ltd. - the first open source motorsport project. For the mesh creation I used the automated hex-dominant operation for external flow. This operation has about 5 input parameters that are enough to create a virtual wind tunnel around the CAD model shown in the picture above. The pictures below show the automatically created wind tunnel mesh.
Especially the region behind the car body where significant separation effects can be expected would need to be more refined in order to resolve the phenomena in this region. This shows that the automated hex-dominant mesh operations are meant for first test or rough analyses. For more detailed analyses, the fully featured hex-dominant operation can be used. The analysis itself was set up using the steady-state incompressible fluid flow analysis type with a k-omega-SST model for the turbulence. The analysis was carried out on 32 cores and took around an half hour. The picture below shows the pressure map on the car surface.
The picture below shows a streamline visualization of a this case with a significant finer mesh , post-processed locally with ParaView