Porous media
 

Hi,

I am trying to introduce a porous media zone in my problem of natural circulation. I know the pressure drop in this zone. But when I am trying to introduce the porous media zone, I have this error message:

Error: Internal error at line 562 in file 'amgif.c'. divergence detected in AMG solver Error Object: ()

Could anyone help me?

Maybe anyone knows what FLUENT tutorial treats this problem.

Thank you

Re: Porous media
 

Your problem isn't stable - some of the variables change rapidly and the solution doesn't converge. May be You will have success by reducing the relaxation factors.

Re: Porous media
 

Please note that you cannot use the PISO scheme with porous medium.

Re: Porous media
 

Thank you very much,

I have use another discretization scheme, and it works.

Thank you once more

Re: Porous media
 

You also have to take in account that if the drop pressure is big - you should run Fluent in double precision

f.e.:

fluent -2ddp