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How to define Cp using UDF?

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Old   January 28, 2005, 00:47
Default How to define Cp using UDF?
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Feng
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I am using FLUENT 6.1 to model solidification process. Since FLUENT can not define thermal-physical properties seperately for solid/liquid, I have to use UDF to realize the task. However, there is no "user defined" option for Cp. I don't know why and want to know how to define Cp for solid and liquid seperately. Any suggestions will be appreciated very much!
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Old   January 28, 2005, 14:21
Default Re: How to define Cp using UDF?
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lily
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Try to use DEFINE_PROPERTY and define Cp. Once complied, link the defined Cp to the material property.
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Old   January 28, 2005, 17:09
Default Re: How to define Cp using UDF?
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Feng
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Thanks for your reply. I was trying to do so. I can do this for density and conductivity, but this doesn't work for Cp, since there is no "user defined" option in the dropping list for Cp. I don't really know why there is no "user defined" option for Cp. Any further advice will be appreciated!
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Old   January 31, 2005, 03:09
Default Re: How to define Cp using UDF?
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2L
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According to Fluent user's guide, "UDFs cannot be used to define specific heat properties; specific heat data can only be accessed and not modified in FLUENT." So I think you should use the mixture model or something using species (one for liquid phase and one for solid phase). Hope it will help you.
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Old   February 2, 2005, 02:42
Default Re: How to define Cp using UDF?
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FJ
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Hi,

You have to customize the real gas model. Otherwise,you can't do that even via UDF in usual way.

Thanks,

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Old   November 15, 2012, 17:36
Default This might be too late i guess
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Abhijeet Shrawage
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but this is how you have to define specific heat using a UDF
DEFINE_SPECIFIC_HEAT(Cp, c, t)

hope it helps either you or someone else who stumbles on to this thread.
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