******************* 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. ******************* Hi All, I am trying to run a simple case prescribing an exponential function that is sinusoidal in time for the energy equation in both APE and LEE solvers. I have the analytical solution for this case. The results from APE and LEE solvers agree with each other but the amplitude is quite different from the analytical solution. I have included a more detailed summary (pdf) and all the case setup files in the zip file. I was wondering if I messed up the setup for the cases or is there some kind of scaling on the variables that I am not aware of? Thank you all. *YiLin Liu * *403-397-3457* *liuyilin.liu@gmail.com <liuyilin.liu@gmail.com>* MASc Student at CML <https://cml.mech.ubc.ca/> UBC
Dear YiLin, I have had a look at the files you provided. To me it seems that you likely just have mistyped a value in your source term, which would be: alpha = ln(2)/9 = 0.0770 (you have it included as 0.77 in your casefiles). I did run and re-run the APE case with both your original settings and the corrected, lower alpha, and finally obtained amplitudes for the pressure of [-2.46; 0.64]. If I see that correctly, there is still a discrepancy to the analytical solution, but at least the values are in the right ballpark now. I hope that already helps you a bit. -- Best regards, --------------------------------------------------- Hanna Reinhardt, M.Sc. Research Associate Simulation of reactive Thermo-Fluid Systems (STFS) Technische Universität Darmstadt Otto-Berndt-Straße 2, 64287 Darmstadt Raum: L1|01 293 Tel: +49 6151 16 24144 Fax: +49 6151 16 24140 www.stfs.tu-darmstadt.de<http://www.stfs.tu-darmstadt.de> --------------------------------------------------- ________________________________ Von: nektar-users-bounces@imperial.ac.uk <nektar-users-bounces@imperial.ac.uk> im Auftrag von Paul Liu <liuyilin.liu@gmail.com> Gesendet: Montag, 31. Januar 2022 19:50 An: nektar-users@imperial.ac.uk Betreff: [Nektar-users] Acoustic Solver Case Questions This email from liuyilin.liu@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. Hi All, I am trying to run a simple case prescribing an exponential function that is sinusoidal in time for the energy equation in both APE and LEE solvers. I have the analytical solution for this case. The results from APE and LEE solvers agree with each other but the amplitude is quite different from the analytical solution. I have included a more detailed summary (pdf) and all the case setup files in the zip file. I was wondering if I messed up the setup for the cases or is there some kind of scaling on the variables that I am not aware of? Thank you all. YiLin Liu 403-397-3457 liuyilin.liu@gmail.com<mailto:liuyilin.liu@gmail.com> MASc Student at CML<https://cml.mech.ubc.ca/> UBC
participants (2)
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Paul Liu
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Reinhardt, Hanna