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Urgent: Convergence ERROR

Pioneer
Pioneer

Hello community 

i have these convergence curves, the energy curve is very far from flow residual target what i can do to improve the convergence even if i try to reduce the residual target value it stays the same thing.
any suggestions t solve this ? 

thank you in advance 

4 REPLIES 4

Re: Urgent: Convergence ERROR

Gears Phenom Gears Phenom
Gears Phenom

Try to increase timestep (if your simulation is steady state). Residual target dont affect solution, it only tells solver where to stop calculation.

You can also enable option "Freeze flow field at convergence" so when flow (pressure and moment) residuals are less than residual target solver dont calculate them, and calculate only energy equation.

Usually thermal part of solution converges mush slower than flow part; they have different timescales.

Re: Urgent: Convergence ERROR

Pioneer
Pioneer
thank you for responding me i will try this

Re: Urgent: Convergence ERROR

Pioneer
Pioneer

after 2 hours it show me this error but the calculate time didn't stop, what should i do to solve this ?

Re: Urgent: Convergence ERROR

Gears Phenom Gears Phenom
Gears Phenom
I dont have any idea, looks like some system error rather than convergence/computational issue.