Learning Forum

[S A]

Hello,

 

Could someone please help me with this error when I run (DPM) Eulerien model?

 

I keep getting Floating point error after some iterations.

 

Thank you very much!

[Rob]

DPM isn't Eulerian unless you're running DDPM?  How are the residuals looking as the solver fails?

[S A]

Hi Rob and Thank you for your reply!

Yes, you are right I'm sorry, it is DDPM. I will attach a picture of the residuals. they vary as I change some geometries but always fails the same way, with a great spike.

[Rob]

OK, so the model has diverged. It's not looking to good up to that point either. How does the flow field look at the 1100 iteration point? 

[S A]

Thank you Rob. How can I check that, if I may ask please? I'm new to this and still learning.

In another geometry the residuals looks much smoother but still diverges and gives the same result

[S A]

I tried using a different turbulence model, it does not diverge but doesnt converge either. I was using Realizable k-e and changed to SST k-w

[Rob]

That's moving rather than solving the problem, but will give some clues as to what's going wrong. Have a look at the flow field and volume fraction to see where things aren't working properly.