I´m interested in creating a mesh similar to the one from this tutorial, but I´m having trouble since the tutorial starts with the simulation setup.
First, I would like to know how can I create that “C” type inlet, or if it´s ok to use a square bounding box as usual.
Second I would like to confirm if I should use 1m for the size of the bounding box in the z coordenate and then just apply the 2D Empty boundary condition to the sides of the domain.
There you can see how the mesh can be generated. Boundary conditions will also be covered there.
Some small hints concerning the setup:
• In general the C-grid is the best one for this case because the mesh quality will be the best at the trailing edge
• Since the C-grid is symmetric, it is optimal for various angles of attack.
• When using non-reflective boundary conditions L_Z & L_Y can be 20-25 times the length of the profile. L_B has to be a little bit higher 25-30 times the length of the profile.
I don’t think there’s a way to create 2D mesh with the hex-dominant parametric algorithm on SimScale yet, because the underlying SnappyHexMesh tool generates 3D cells only. There is a way to get a 2D slice from a 3D mesh, but you will need to work with native OpenFOAM. SnappyHexMesh - OpenFOAMWiki
Because the mesh tool doesn’t create 2D cells, you can’t use empty as BC on the sides.
You don’t need a C-grid in this case, because of the unstructured nature of the cells. It won’t matter even if you want to vary AOA.