Temperature dependent properties in thermophysicalProperties

jmdf · July 14, 2015, 06:51

Hello,

i'm using the chtMultiRegionFoam to perform an heat transfer study throughout a domain with different regions and i want to establish that one of the regions have their properties depending on the temperature read on a certain part of the domain. I have a table with the properties values varying with the temperature.

Right now i'm trying to implement this using the thermophysicalProperties dictionary but i haven't find a way to do it.

Does anyone know a good way to implement such thing?

Thanks in advance,
Regards

zfaraday · July 14, 2015, 07:03

Hi Joao,

If you know a correlation that relates such properties to temperature you can use polynomial type for transport properties and hPolynomial for thermo properties instead constIso and hConst...

Best regards,

Alex

jmdf · July 14, 2015, 07:08

Hi Alex,

thanks for you input.

I know that and i tried to get that correlation and implement it with the polynomial but i did not succeed.

Still a possibility and i'm going to check it one more but still if there is a way to inserted the properties directly from a table would be better when changing material or the polynomial cannot be used.

Regards

July 14, 2015, 06:51	Temperature dependent properties in thermophysicalProperties	#1
jmdf Member João Ferreira Join Date: Nov 2014 Location: Braga, Portugal Posts: 53 Rep Power: 12	Hello, i'm using the chtMultiRegionFoam to perform an heat transfer study throughout a domain with different regions and i want to establish that one of the regions have their properties depending on the temperature read on a certain part of the domain. I have a table with the properties values varying with the temperature. Right now i'm trying to implement this using the thermophysicalProperties dictionary but i haven't find a way to do it. Does anyone know a good way to implement such thing? Thanks in advance, Regards

July 14, 2015, 07:03		#2
zfaraday Senior Member Alex Join Date: Oct 2013 Posts: 337 Rep Power: 22	Hi Joao, If you know a correlation that relates such properties to temperature you can use polynomial type for transport properties and hPolynomial for thermo properties instead constIso and hConst... Best regards, Alex __________________ Web site where I present my Master's Thesis: foamingtime.wordpress.com The case I talk about in this site was solved with chtMultiRegionSimpleFoam solver and involves radiation. Some basic tutorials are also resolved step by step in the web. If you are interested in these matters, you are invited to come in!

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July 14, 2015, 07:08		#3
jmdf Member João Ferreira Join Date: Nov 2014 Location: Braga, Portugal Posts: 53 Rep Power: 12	Hi Alex, thanks for you input. I know that and i tried to get that correlation and implement it with the polynomial but i did not succeed. Still a possibility and i'm going to check it one more but still if there is a way to inserted the properties directly from a table would be better when changing material or the polynomial cannot be used. Regards