[hbulus]

Hello dear foamers,

I am doing external flow analysis with unstructered tet meshes. I faced with strange behaviour: Force residuals do not converge even though residuals are perfectly aligned on specific values like 10^-5. Is there anyone who can explain this situation and give me advices to improve my vision.
(For your info: momentumPredictor is opened, i suspect from this.)

Have good days!

[hbulus]

Waov this might be hard question? Does anyone has any idea?

[piu58]

Wen need the case. We cannot guess what ges wrong form these few sentences.

[arjun]

Originally Posted by hbulus

Hello dear foamers,

I am doing external flow analysis with unstructered tet meshes. I faced with strange behaviour: Force residuals do not converge even though residuals are perfectly aligned on specific values like 10^-5. Is there anyone who can explain this situation and give me advices to improve my vision.
(For your info: momentumPredictor is opened, i suspect from this.)

Have good days!

Some of these problems are unsteady in nature and even if you solve them as steady you can see that drag lifts etc keep oscillating. This is normal behaviour and observed many times.

[hbulus]

Originally Posted by piu58

Wen need the case. We cannot guess what ges wrong form these few sentences.

As you wish but i cannot share the polyMesh file due to prohibition of huge transfer files to outside. The case is oneram6 validation case which is fully made of unstructural tetrahedral meshes .

The other necessary files attached.

Thanks for every opinion.

[hbulus]

Originally Posted by arjun

Some of these problems are unsteady in nature and even if you solve them as steady you can see that drag lifts etc keep oscillating. This is normal behaviour and observed many times.

Yeap, you are right but case is oneram6 validation case. There is no BL Seperation and wake production. Steady solution must exist. 0.84 mach and 3.04 aoa .