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UDF for heat transfer coefficient in porous media

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Old   July 24, 2014, 18:37
Default UDF for heat transfer coefficient in porous media
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I am trying to write a udf to define the heat transfer coeff. in thermal non equilibrium porous zone. The model is 2d-axisymmetric.

Attached is the schematic of the model. I need to calculate following variables:

1- averaged density and temperature at B-inlet.
2- averaged density at zone B.

I don't know how to refer to a interior surface to get the properties. should I define an interface when creating the mesh or I could get the cell by some other means?

I appreciate any suggestions
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heat transfer, porous media, udf exporting variable

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