For Boundary Meshes: Once in Fluent Meshing, you can read in a boundary mesh file. Then, go in the Menu to Boundary -> Manage
To Mirror your geometry, select one of the models that has been created and choose the option “Scale”. Scale it by -1 in the appropriate plane. This will invert it. Afterwards, you can translate or rotate the geometry.
For Volume Meshes: Once in Fluent Meshing, you can read in a case or the original mesh file. Then go in the Menu to Mesh -> Manage
To Mirror your geometry, select one of the models that have been created and choose the option “Scale”. Scale it by -1 in the appropriate plane. This will invert it. Afterwards, you can translate or rotate the geometry.