Hi Mohsen, Very thank you again, that is exactly what I was trying to understand. One more question, is it possible to save intermediate files for this filter, in the same way as check points (chk files) and other filters? Cheers,Paulo Henrique Em terça-feira, 25 de outubro de 2022 06:15:14 BRT, Lahooti, Mohsen <m.lahooti@imperial.ac.uk> escreveu: #yiv7544935840 P {margin-top:0;margin-bottom:0;}Hi Paulo, The output force includes the cross-sectional area of the boundary. For example, if you are simulating the flow over a cylinder, the force integrals would be performed over the "perimeter" of the cylinder where the area effectively is D, the cylinder diameter in each of x or y direction. The forces are, however, output on the mean Fourier plane and hence they are per unit length of the spanwise length.you can also put <PARAM NAME="OutputAllPlanes">true</PARAM> in the filter parameters to get the forces over all planes Cheers,MohsenFrom: paulohferr@yahoo.com <paulohferr@yahoo.com> Sent: Tuesday, October 25, 2022 12:44 AM To: nektar-users <nektar-users@imperial.ac.uk>; Lahooti, Mohsen <m.lahooti@imperial.ac.uk> Subject: Re: [Nektar-users] AeroForces filter calculation in 3DH1D problem with XYofZ mapping Thank you very much, Mohsen. One more question If possible, is this force "normalized" by some area, length or another quantity? Regards,Paulo Henrique Em domingo, 23 de outubro de 2022 04:25:08 BRT, Lahooti, Mohsen <m.lahooti@imperial.ac.uk> escreveu: Hi Paulo, FilterAeroforces will calculate the forces in computational space, the transformed coords and then transforms the result in physical space. So the effect of translation and deformation is considered when calculating the forces. The result however will be in physical space as it should be Hope this helps CheersMohsen Sent from Outlook for iOSFrom: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> on behalf of paulohferr@yahoo.com <paulohferr@yahoo.com> Sent: Sunday, October 23, 2022 2:32:56 AM To: nektar-users <nektar-users@imperial.ac.uk> Subject: [Nektar-users] AeroForces filter calculation in 3DH1D problem with XYofZ mapping | This email from paulohferr@yahoo.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 yoursafe senders list to disable email stamping for this address. | Hi all, I would like to know if, by using the XYofZ mapping in a quasi-3D problem with a Fourier expansion in the Z direction, will the AeroForces filter provide me with the resulting forces calculated in the transformed coordinates, that is, already considering the forces integrated over the surface of the three-dimensional body resulting from the transformation, and decomposed in each direction (X and Y)? Or should I use another filter or another way to obtain the temporal history of forces in this case? Thanks in advance. Best regards,Paulo Henrique