about Maxium Inner Iterations

baojian · January 1, 2019, 21:35

I am doing the tow-ways FSI problem on star-ccm,transient turbulence model ,using implicity coupling method.in field exchange control property dialog ,i set inner itraction every exchange 20,and I disabled Maxium Inner Iteractions ,then ,i found no curve appears in plot window and solution time always equal to 0s in scalar scene,but in residual the curves always change .
and when i active the Maxium Inner Iteractions,all plots window show the curve change.
I do not know this problem . please help me

me3840 · January 2, 2019, 10:17

If you disable the maximum inner iterations criterion then the solver will iterate on the same timestep endlessly provided there are no other stopping criterion active. That's why you see no solution time update.

I would suggest you either activate it or look at other stopping criterion.

January 1, 2019, 21:35	about Maxium Inner Iterations	#1
baojian New Member 鲍健 Join Date: Dec 2018 Posts: 7 Rep Power: 7	I am doing the tow-ways FSI problem on star-ccm,transient turbulence model ,using implicity coupling method.in field exchange control property dialog ,i set inner itraction every exchange 20,and I disabled Maxium Inner Iteractions ,then ,i found no curve appears in plot window and solution time always equal to 0s in scalar scene,but in residual the curves always change . and when i active the Maxium Inner Iteractions,all plots window show the curve change. I do not know this problem . please help me

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January 2, 2019, 10:17		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	If you disable the maximum inner iterations criterion then the solver will iterate on the same timestep endlessly provided there are no other stopping criterion active. That's why you see no solution time update. I would suggest you either activate it or look at other stopping criterion.