anisotropic conductivity for a gas phase

gghazal · May 27, 2017, 08:42

Hello everyone !

I'm trying to solve thermal conductivity in a gas mixture and I would like to set a radial conductivity that is different than the axial one.
For a solid, it is possible to do that by selecting "cyl-orthotropic" in the conductivity tab in materials. However this option does not show up for a fluid material....
I also can't see how to do it in a UDF since it is not possible either to select "user-defined anisoptropic conductivity"...

Does anyone know if there is a way to work around it ?

Thank you !

GG

g3ntl3m4n · January 23, 2018, 16:38

Hi gghazal

I am facing the same problem. Did you find a way to work with anisotropic conductivity for a fluid phase?

thank you.

gghazal · January 24, 2018, 11:53

Hello
One workaround is to consider a "virtual" porous media with a porosity equal to 0 and setting the solid to have the same properties of the fluid.
The effective conductvity will be equal to that of the porous media (it is possible to set an anisotropic conductivity)
GG

May 27, 2017, 08:42	anisotropic conductivity for a fluid phase	#1
gghazal New Member Join Date: Feb 2011 Location: France Posts: 9 Rep Power: 15	Hello everyone ! I'm trying to solve thermal conductivity in a gas mixture and I would like to set a radial conductivity that is different than the axial one. For a solid, it is possible to do that by selecting "cyl-orthotropic" in the conductivity tab in materials. However this option does not show up for a fluid material.... I also can't see how to do it in a UDF since it is not possible either to select "user-defined anisoptropic conductivity"... Does anyone know if there is a way to work around it ? Thank you ! GG Last edited by gghazal; May 29, 2017 at 04:02.

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January 23, 2018, 16:38		#2
g3ntl3m4n New Member Ernest Gonza Join Date: Jan 2018 Posts: 1 Rep Power: 0	Hi gghazal I am facing the same problem. Did you find a way to work with anisotropic conductivity for a fluid phase? thank you.

January 24, 2018, 11:53		#3
gghazal New Member Join Date: Feb 2011 Location: France Posts: 9 Rep Power: 15	Hello One workaround is to consider a "virtual" porous media with a porosity equal to 0 and setting the solid to have the same properties of the fluid. The effective conductvity will be equal to that of the porous media (it is possible to set an anisotropic conductivity) GG