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ERROR : Floating point exception (core dumped) |
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November 14, 2013, 02:27 |
ERROR : Floating point exception (core dumped)
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#1 |
Senior Member
Join Date: Sep 2013
Location: Bangalore India
Posts: 134
Rep Power: 12 |
Hi
I am simulating a overflow valve with simple foam. Velocity of fluid is 0.27 m/s Dynamic Viscosity = 8.26 X 10^-6 Kg/m.s Density = 830 Kg / m3 Radius of the inlet = 6.9 mm I am getting the error which is attached and also looked in to many discussions on this topic but not able to fix this issue.. Please help me |
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November 14, 2013, 05:33 |
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#2 |
New Member
Martin Beeger
Join Date: Oct 2013
Posts: 10
Rep Power: 12 |
Your viscosity maybe too small. Try a bigger value and see if this fixes your error.
This shown error is a preconditioner failure, if increasing viscosity does not help try tuning preconditioner parameters. |
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November 14, 2013, 06:00 |
simpleFOAM SOLVER
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#3 |
Senior Member
Join Date: Sep 2013
Location: Bangalore India
Posts: 134
Rep Power: 12 |
[FoamFile
{ version 2.0; format ascii; class dictionary; location "system"; object fvSolution; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // solvers { p { solver PCG; preconditioner DIC; tolerance 1e-06; relTol 0.01; } U { solver PBiCG; preconditioner DILU; tolerance 1e-05; relTol 0.1; } k { solver PBiCG; preconditioner DILU; tolerance 1e-05; relTol 0.1; } epsilon { solver PBiCG; preconditioner DILU; tolerance 1e-05; relTol 0.1; } R { solver PBiCG; preconditioner DILU; tolerance 1e-05; relTol 0.1; } nuTilda { solver PBiCG; preconditioner DILU; tolerance 1e-05; relTol 0.1; } } SIMPLE { nNonOrthogonalCorrectors 2; pRefCell 101; pRefCell 58; pRefCell 767; pRefCell 527; pRefValue 0; residualControl { p 1e-2; U 1e-3; "(k|epsilon|omega)" 1e-3; } } relaxationFactors { fields { p 0.3; } equations { U 0.7; k 0.7; epsilon 0.7; R 0.7; nuTilda 0.7; } } // ************************************************** *********************** //] THis is the solver file... Please check let me know anything need to be changed ? |
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November 14, 2013, 06:40 |
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#4 |
New Member
Martin Beeger
Join Date: Oct 2013
Posts: 10
Rep Power: 12 |
Try setting the dynamic viscosity to a bigger value (like 8e-3 instead of 8e-6). I don't actually know which changes you have to make to get you preconditioner able to handle these viscosities.
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November 14, 2013, 07:03 |
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#5 |
Senior Member
Join Date: Sep 2013
Location: Bangalore India
Posts: 134
Rep Power: 12 |
Hi,
I should not change dynamic viscosity as these are defined values for my case ... |
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