Hi Junting, On 18/06/2019 15:15, Junting Chen wrote: > So first of all I tried to run the simulation Dr.Vincent provided along > with the paper - flow past a 3d cylinder. I added a "tend" value and > didn't do any other change. It runs ok, take a little too long to see > some results. Then I increased the inlet velocity from 0.2 to 3.2, and > it no longer converges. All I got is 10E38. Is it because of the > increase of Reynolds number from ~3k to ~30k?
So increasing the Reynolds number will almost certainly require either an increase in polynomial order or mesh resolution. However, a bigger problem is that your inlet velocity is now likely supersonic which will dramatically change the dynamics of the simulation. Specifically, at a minimum, you will need to enable the shock capturing functionality in PyFR in order to stabilize the simulation. > As I read news on your tweet, Niki has developed an incompressible > solver on PyFR. Any chance it will be open sourced? This solver is the ac- prefixed solver (with AC standing for artificial compressibility which is the technology which underpins the incompressible solver). As such not only is it open source but it is also released and available in current versions of PyFR. Regards, Freddie. -- You received this message because you are subscribed to the Google Groups "PyFR Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. Visit this group at https://groups.google.com/group/pyfrmailinglist. To view this discussion on the web, visit https://groups.google.com/d/msgid/pyfrmailinglist/72e4b368-599a-e03d-4919-0c5f749dc996%40witherden.org. For more options, visit https://groups.google.com/d/optout.
