I am new to FR and I have two questions:
1-What is Anti-Aliasing in the high-order CFD framework? I come from FV community and this matter somewhat puzzles me!
2-I know high-order meshing in case of the curved geometries is important with FR. How can I generate a high-order mesh from a linear mesh produced in a third-party package? FYI, I don’t have access to Pointwise, so it’s not an option.
Details regarding anti-aliasing and why it is required can be found here:
On the meshing side you will want to use a tool which can generate curved meshes directly. Pointwise and Gmsh are the most popular here. There are tools which can attempt to curve existing grids (for example NekMesh) although I do not have any experience with them.
Good point here. Actually I use NekMesh “projectcad” module to do it in Nektar, but is there a way to convert the high-order mesh to a format compatible with pyFR?
I believe there is a route to get the resulting mesh into the Gmsh .msh format (or a format that Gmsh itself can open and then re-save as an .msh file). This .msh can then be directly imported into PyFR.