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Floating Point Exception Error

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Old   August 22, 2014, 10:19
Default Floating Point Exception Error
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Shane
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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


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Old   August 22, 2014, 17:51
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Hi!

I have same problem. Do you work parallel solver?
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Old   August 22, 2014, 22:38
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Yes I used parallel solver. I believe this has to do with my mesh having negative volume elements.
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Old   August 23, 2014, 04:10
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I haven't negative volume elements but i get same error. I think it is about parallel solver.
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Old   August 23, 2014, 06:28
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Have you been able to figure out the cause of this? It runs Ok in series?
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Old   August 23, 2014, 10:14
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I have 28 species and wall reactions. So i couldn't get serial solver.i only guess.
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Old   August 24, 2014, 00:38
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Is anyone able to help out with this issue?
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Old   January 22, 2016, 02:38
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Quote:
Originally Posted by nyox View Post
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 !!!
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Old   January 22, 2016, 08:53
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Dave M.
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Check your mesh quality for negative volumes, high aspect ratio and so on. Also check your boundary conditions - are they correctly set?
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Old   August 18, 2018, 11:21
Default solution
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Ali Mohammadi
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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.
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Old   November 9, 2018, 14:30
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Quote:
Originally Posted by cfd lover View Post
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.
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Old   November 30, 2018, 13:31
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Quote:
Originally Posted by cfd lover View Post
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?
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