Hi everyone, Yes, switching to the incompressible FSI solver branch makes FilterAeroForces write the moment on the selected boundary (I don’t know if it’s exclusively in the FSI branch, but this s a way to do it). To switch branches: git clone http://gitlab.nektar.info/clone/nektar/nektar.git nektar++FSI cd nektar++FSI git checkout feature/IncNS-FSI And compile as usual. I hope this helps. Best, Robin On 3 May 2020, at 19:11, Sherwin, Spencer J <s.sherwin@imperial.ac.uk<mailto:s.sherwin@imperial.ac.uk>> wrote: Hi Howard, I think it is might be possible to get the AeroFocres filter to write out the moment force too. At least it does appear for some solvers. @Robin: Is there an option to write the moment force you are using in your simulations? Cheers, Spencer. On 2 May 2020, at 04:32, hongfu2233 <hongfu2233@gmail.com<mailto:hongfu2233@gmail.com>> wrote: This email from hongfu2233@gmail.com<mailto:hongfu2233@gmail.com> originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list<https://spam.ic.ac.uk/SpamConsole/Senders.aspx> to disable email stamping for this address. Dear all, I would like to know how to monitor the torsional aerodynamic force for a 2D square cylinder when using IncNavierStokesSolver? As far as I know, the Filters "AeroForces" can only monitor the drag and lift forces. Thank you in advance for help. Kind regards, Howard _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users Spencer Sherwin FREng, FRAeS Head of Aerodynamics Section, Director of Research Computing Service, Professor of Computational Fluid Mechanics, Department of Aeronautics, s.sherwin@imperial.ac.uk<mailto:s.sherwin@imperial.ac.uk> South Kensington Campus, Phone: +44 (0)20 7594 5052 Imperial College London, Fax: +44 (0)20 7594 1974 London, SW7 2AZ, UK http://www.imperial.ac.uk/people/s.sherwin/