Divergence detected in AMG solver
 

Hi every body
I am doing 2D simulation for the quenching process with the following properties:
velocity:35m/s
Temperature:1143 °k
Turbulent Model :K-omega SST
Explicit RF for Momentum: 0.6
for Pressure:0.3
I use Nitrogen and Helium as a fluid for quenching
so the some material properties are set as polynomial
the first step is steady state then I have to solve it in 493°k for transient
but even in steady I get the following error ant it divenges so rapidely!!!!

reversed flow in 6 faces on pressure-outlet 17.
# Divergence detected in AMG solver: pressure coupled -> Decreasing coarsening group size!
# Divergence detected in AMG solver: pressure coupled -> Increasing relaxation sweeps!
# You may try the enhanced divergence recovery with (rpsetvar 'amg/protective-enhanced? #t)

Error: Divergence detected in AMG solver: pressure coupled

Error: Divergence detected in AMG solver: pressure coupled


any solution?

hi ,
i have the same problem are you solved it ?¸
please tel me and thank you

Hi,
Thanks for the comment.yes it has already solved I had to patch the whole domain (temperature )

Hi,
I have the same problem,
What does "patch the whole domain" mean?

Best

Fred

Dear Federico,
Could you please share me the steps or screen shot that how you have patched the whole domain (Temperature) and what value of temperature you taken?

Dear Mina,
Could you please share me the steps or screen shot that how you have patched the whole domain (Temperature) and what value of temperature you taken?