Hi Ismael, there is a branch, features/CompressibleVariables that does that. So, you would need to checkout that branch first. The feature works as a FieldConvert module and is implemented in utilities/FieldConvert. Here, ProcessChangeVariables.cpp takes the compressible variables (rho, rhou, rhov, rhow, E) and convert them into incompressible variables (u, v, w, p). I hope this helps. Best, Gianmarco On Jul 14, 2017, at 9:28 AM, Ismael El Houas Ghouddana <ismael.elhouas@gmail.com<mailto:ismael.elhouas@gmail.com>> wrote: Hello Nektar developers, Is there any way to use the AeroForces filter in a compressible flow simulation? Kind Regards, Ismael _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users