Hi, I have been trying to simulate the Turbulent Channel flow test case as well using the same session file. What I found was transition takes a bit of time to kick in, so it's better to use a higher time step and keep storing files every 5-10 time units, as has been suggested in a previous thread. I do have a few doubts queries I would like to post to the community though: 1. The turbulent flow that results from my simulations is pretty unstable and keeps diverging frequently. I have used "DEALISING" to stabilize the flow, but it's not much help. I understand that I can use SVV parameters to stabilize the flow, but is there any workaround for this? Also, how do I know what SVV parameters to use? 2. Can I use a higher noise value to kickstart the transition process faster? 3.Are there any filters I can use to calculate the turbulent kinetic energy budgets? Regards, Debshankar Ghosh Graduate Student Faculty of Applied Science | School of Engineering The University of British Columbia | Okanagan Campus EME 1240 3333 University Way | Kelowna British Columbia | V1V 1V7 Canada On Thu, Feb 4, 2021 at 8:50 PM Eli Frydman <elimanu123@gmail.com> wrote:
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Hi all,
I tried to run the turbulent channel flow test case from the user guide (session file TurbChFl_3DH1D.xml) but i didn't get any turbulent flow. I used a body force in the u direction as explained and added also a perturbation in the spanwise direction and didn't get any transition.
Regards, Eli _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk https://mailman.ic.ac.uk/mailman/listinfo/nektar-users