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Old   June 7, 2004, 06:42
Default Thermal conductivity in porous media
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Andrea
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I have a gas (water and hydrogen) in a graphite porous media. I suppose that the effective thermal conductivity is greater than the gas thermal coductivity.

How can I model that?

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Andrea
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Old   June 9, 2004, 18:48
Default Re: Thermal conductivity in porous media
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Jeff
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If it's steady-state, just use the porsity weighted conductivity.

Jeff
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Old   June 10, 2004, 04:52
Default Re: Thermal conductivity in porous media
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Andrea
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It is a steady-state, in Cfx 4.4

What did you intend for "porosity weighted conductivity"?

I have to set my gas thermal conductivity like

porosity*gas_therm_cond

or

porosity*gas_therm_cond+(1-porosity)*solid_therm_cond

Thanks

Andrea

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Old   June 11, 2004, 12:10
Default Re: Thermal conductivity in porous media
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Jeff
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You got it right with the second option. You have to include the effect of the higher conductivity.

Jeff
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Old   August 5, 2004, 16:12
Default Re: Thermal conductivity in composite materials
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Taghreed Raho
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Dear sir I have gradient ceramic-metal composite materials,I need a suggetion how to test thermal conductivity ( instruments & conditions) I'm will be verry glad to hear from you . Best wishes and regards

Taghreed
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