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Invalid cp (0.000000e+00 J/kgK) for water-vapor at temperature -nan(ind) K |
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May 19, 2019, 09:50 |
Invalid cp (0.000000e+00 J/kgK) for water-vapor at temperature -nan(ind) K
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#1 |
New Member
Naveen
Join Date: Jan 2016
Location: INDIA
Posts: 20
Rep Power: 10 |
WARNING: Invalid cp (0.000000e+00 J/kgK) for water-vapor at temperature -nan(ind) K
above warning is coming whenever i run my simulation, however i used inbuilt properties of water vapor i.e. piecewise-polynomial. |
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July 24, 2019, 06:34 |
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#2 |
New Member
Arin Altuntas
Join Date: May 2019
Posts: 3
Rep Power: 7 |
This had happened to me before. How I solve my problem is, I disable some of optional functions on my models (i.e. I was working on PEM model and I disable reaction heating on model settings.) After some iteration, when I activate this function again, it does not give an error.
Therefore I believe it is some kind of divergence error. Try to disable energy equation, or some part of your models if possible, then reactivate them after some iterations |
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July 24, 2019, 17:59 |
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#3 |
New Member
Naveen
Join Date: Jan 2016
Location: INDIA
Posts: 20
Rep Power: 10 |
Dear aring,
i am facing above problem after many iterations. as my problem is transient heat transfer with phase change, this error comes after 150000 iterations. |
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August 16, 2020, 22:27 |
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#4 |
New Member
Arif
Join Date: Sep 2017
Posts: 17
Rep Power: 9 |
Hi i am facing the same problem after 3000 iterations. the residuals for all parameters are under 1e-05. Can u plz help me in resolving this issue
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June 30, 2023, 08:01 |
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#5 | |
New Member
Damir
Join Date: Apr 2023
Posts: 7
Rep Power: 3 |
Quote:
I am modelling PCM solidification where properties are set by UDF(compiled). My solution give same error if my specific heat defined by UDF and density difened by Boussinesq. 2 case if both given by UDF converge but with some inconsitency in result before phase change starts. Do someone know solution? |
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fluent, multiphase mixture model |
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