******************* This email 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. ******************* Hello everybody, I am currently running Quasi-3D CG-SVV iLES with the IncNavierStokesSolver and noticed that the SVV PowerKernel is not activated/available for Fourier discretizations along homogeneous directions. However in the paper "Industry-relevant ILES of a high-performance road car via S/HPEM" (Mengaldo et al. 2021) it says: "The current best practice in Nektar has been to use the "DG" kernel in general while employin the "power-law" kenel only along homogeneous directions in case periodic boundary conditions are present" So does this mean the PowerKernel is only available if S/HP is also used along homogeneous directions? Why not use the DGKernel then? And how does one setup different SVV kernels for different spatial directions? If it DOES refer to the quasi-3D case, however, there seems to be an issue, since no output is given regarding SVV, if the "SpectralVanishingViscosityHomo1D" flag is set to "PowerKernel" within the session file. Also I noticed that it seems to be impossible to activate SVV only for the S/HP discretizations in quasi-3D cases, i.e. without using SVV for the Homo1D directions, but vice versa it works. All the best Alex Sicher versendet mit [Proton Mail](https://proton.me/).