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Invalid cp (0.000000e+00 J/kgK) for water-vapor at temperature -nan(ind) K

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Old   May 19, 2019, 08:50
Default Invalid cp (0.000000e+00 J/kgK) for water-vapor at temperature -nan(ind) K
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Naveen
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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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Old   July 24, 2019, 05:34
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Arin Altuntas
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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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Old   July 24, 2019, 16:59
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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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Old   August 16, 2020, 21:27
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Quote:
Originally Posted by nvnkush View Post
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.
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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