specific heat capacity at constant pressure in CFD Post

newbie384 · March 21, 2014, 23:24

I know that I can see the value of specific heat capacity at constant pressure under material in cfx pre. How can I use the value to create a variable in CFD post? For example, static enthalpy=specific heat capacity at constant pressure * static temperature.

I just could not find it in cfd post. what I did is to assign the value of specific heat capacity at constant pressure by myself in my variable. However, this will give me the wrong unit.

Thank you in advance.

newbie384 · March 21, 2014, 23:39

I think I found where to get it. Thanks anyway.

ghofrane · November 26, 2015, 12:54

hi, please can you give to me how you calculat the specific heat in cfd post
because i need to see the variation of cp in diffrrete position in the pipe
thx

ghorrocks · November 26, 2015, 16:34

If you have variable Cp then it should be available as a variable in the puzzlingly labeled "..." button. If not you will have to assign it to a additional variable set to a CEL value, rerun the simulation and then you will have access to it.

ghofrane · November 27, 2015, 17:00

thank you very much for yr reply.
I have a cp as fonction of temperature and i solved it with udf in fluent but i can found it in CFD post, and i don't found also the thermal conductivity.
can you please explian me more how i can do it because this is the first that i work with CFD post and i don't really understand your answer.
thank you

ghorrocks · November 27, 2015, 22:25

If the simulation was done in Fluent I do not know what it does - this is the CFX forum. Try the fluent forum.

March 21, 2014, 23:24	specific heat capacity at constant pressure in CFD Post	#1
newbie384 Member Join Date: Mar 2013 Posts: 68 Rep Power: 13	I know that I can see the value of specific heat capacity at constant pressure under material in cfx pre. How can I use the value to create a variable in CFD post? For example, static enthalpy=specific heat capacity at constant pressure * static temperature. I just could not find it in cfd post. what I did is to assign the value of specific heat capacity at constant pressure by myself in my variable. However, this will give me the wrong unit. Thank you in advance.

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March 21, 2014, 23:39		#2
newbie384 Member Join Date: Mar 2013 Posts: 68 Rep Power: 13	I think I found where to get it. Thanks anyway.

November 26, 2015, 12:54		#3
ghofrane New Member ghof Join Date: Nov 2015 Posts: 7 Rep Power: 11	hi, please can you give to me how you calculat the specific heat in cfd post because i need to see the variation of cp in diffrrete position in the pipe thx

November 26, 2015, 16:34		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	If you have variable Cp then it should be available as a variable in the puzzlingly labeled "..." button. If not you will have to assign it to a additional variable set to a CEL value, rerun the simulation and then you will have access to it.

November 27, 2015, 17:00		#5
ghofrane New Member ghof Join Date: Nov 2015 Posts: 7 Rep Power: 11	thank you very much for yr reply. I have a cp as fonction of temperature and i solved it with udf in fluent but i can found it in CFD post, and i don't found also the thermal conductivity. can you please explian me more how i can do it because this is the first that i work with CFD post and i don't really understand your answer. thank you

November 27, 2015, 22:25		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	If the simulation was done in Fluent I do not know what it does - this is the CFX forum. Try the fluent forum.