Unsteady Residuals -- CFD Online Discussion Forums

August 21, 2019, 06:07	Unsteady Residuals	#1
mochzeen9964 New Member Mochzeen Join Date: Aug 2019 Posts: 1 Rep Power: 0	Hi all, I am simulating a simple combustor but have been getting steady-unsteady fluctuations of the residual. I have tried many different options to find the source of the fluctuations but have run out of ideas. Any ideas? It fluctuated like crazy, then settles down nicely for about 100 iterations, then suddenly fluctuated again for about 100 iterations. This cycle happened repeatedly. (I tried to post the screenshot but the forum didn't allow it). I'm doing a steady simulation, ~300000 node mesh, stoichiometric CH4-air, methane-air-2step.

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Trackbacks are Off Pingbacks are On Refbacks are On Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How is convergence indicated in the residuals for a unsteady flow simulation in ANSYS	madmechanic	ANSYS	0	June 29, 2019 13:59
To check for unsteady simulation using residuals in flunet	raunakjung	FLUENT	0	March 12, 2017 00:47
motorBike Residuals for SST k-omega... and mine	JR22	OpenFOAM Running, Solving & CFD	6	August 1, 2013 09:08
Residuals are NAN with unsteady plasma flows	rafpepe	SU2	1	June 5, 2013 05:30
judging convergence through residuals	MachZero	Main CFD Forum	7	December 25, 2012 12:18

All times are GMT -4. The time now is 12:02.