[nyox]

I have been getting the same particular error ever since I've tried to run my mesh in Fluent.

Initially, i thought it was because of a bad mesh and I've tried to improve the quality of my mesh as much as possible but I am still getting the same floating point error. Even reducing the under relaxation factor does not help.

Would greatly appreciated if someone can give me some insights, I am truly lost as to what else to do.

This is the full error message;

# Divergence detected in AMG solver: x-momentum -> Increasing relaxation sweeps!

Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: k
Divergence detected in AMG solver: epsilon
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: k
Divergence detected in AMG solver: epsilon
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: k
Divergence detected in AMG solver: epsilon
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: pressure correction
Divergence detected in AMG solver: k
Divergence detected in AMG solver: epsilon
Primitive Error at Node 1: floating point exception

Primitive Error at Node 2: floating point exception

Primitive Error at Node 3: floating point exception

Primitive Error at Node 0: floating point exception

Error: floating point exception
Error Object: #f

[silverra1n]

Hi!

I have same problem. Do you work parallel solver?

[nyox]

Yes I used parallel solver. I believe this has to do with my mesh having negative volume elements.

[silverra1n]

I haven't negative volume elements but i get same error. I think it is about parallel solver.

[nyox]

Have you been able to figure out the cause of this? It runs Ok in series?

[silverra1n]

I have 28 species and wall reactions. So i couldn't get serial solver.i only guess.

[nyox]

Is anyone able to help out with this issue?

[engineer.iman]

Originally Posted by nyox

Is anyone able to help out with this issue?

Did you manage to identify the cause of the error? could you please share how you solved it?
i'm facing the same issue !!!

[Dave_88]

Check your mesh quality for negative volumes, high aspect ratio and so on. Also check your boundary conditions - are they correctly set?

[cfd lover]

I faced the same problem and solved it. My domain is axisymmetric and i had not selected all the edges set as axis boundary.I selected the right edge and it disappeared.

[operalpha]

Originally Posted by cfd lover

I faced the same problem and solved it. My domain is axisymmetric and i had not selected all the edges set as axis boundary.I selected the right edge and it disappeared.

If you want to use a 2D axisymmetric model you have to set the geometry in an special way: The geomery have to be draw in the YX plane and in a way that the rotational axis folows the x direction.

[Oula]

Originally Posted by cfd lover

I faced the same problem and solved it. My domain is axisymmetric and i had not selected all the edges set as axis boundary.I selected the right edge and it disappeared.

Hi cfd lover, was your geometry a 3D or 2D?