The unit of thermal conductivity when adding temperature equation to icoFoam?

mxylondon · February 25, 2013, 09:31

Hi, guys, I have a question when I add temperature equation to icoFoam.
By OpenFOAM Wiki, it's said that, we need to add a new transport property related to the thermal diffusion, like ' DT [0 2 -1 0 0 0 0] 0.002;'
Actually, it is thermal conductivity. But I'm really confused, why it has the same unit as the kinematic viscosity?

Cheers!

akidess · February 25, 2013, 12:01

Study the equations again. DT is as stated thermal diffusivity, and as any other diffusivity it has units m2/s.

mxylondon · February 26, 2013, 06:26

Oh...My fault...It's not conductivity.
Thank you very much!!!!!

February 25, 2013, 09:31	The unit of thermal conductivity when adding temperature equation to icoFoam?	#1
mxylondon Member X Meng Join Date: Jun 2012 Location: Scotland Posts: 89 Rep Power: 14	Hi, guys, I have a question when I add temperature equation to icoFoam. By OpenFOAM Wiki, it's said that, we need to add a new transport property related to the thermal diffusion, like ' DT [0 2 -1 0 0 0 0] 0.002;' Actually, it is thermal conductivity. But I'm really confused, why it has the same unit as the kinematic viscosity? Cheers!

February 25, 2013, 12:01		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 30	Study the equations again. DT is as stated thermal diffusivity, and as any other diffusivity it has units m2/s. __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

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February 26, 2013, 06:26		#3
mxylondon Member X Meng Join Date: Jun 2012 Location: Scotland Posts: 89 Rep Power: 14	Oh...My fault...It's not conductivity. Thank you very much!!!!!