Vorticity NaNs when exporting to .vtu
The vorticity module of FieldConvert leads to NaNs (and some Infs) when used on a .fld file to export to a .vtu file directly. This leads to ParaView not being able to read the .vtu file (because of the presence of NaNs and Infs). No such problem is not seen if exporting into .dat format or if an intermediate .xml file is written.
This can be tested with the files below:
FieldConvert naca.xml conditions.xml naca.fld naca.vtu -m vorticity