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how to define species diffusivity in porous zone

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Old   March 30, 2021, 03:54
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Zheng Zhou
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Hello,everyone. I am a green hand of Fluent. Recently, I got stuck in defining the species diffusivity.There is no option to define the diffusivity in the porous zone. Can anyone teaches me how to set the value of diffusivity in a porous zone (I have written a UDF to define the diffusivity)?
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diffusion coefficient, porous zone, udf

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