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Luis February 6, 2006 22:21

Porosity and Kinematic Diffusivity
Hi, I have a problem. I am trying to set up a kinematic diffusivity variable, but with different values of porosity (Two subregions). Basically what I want is :

Porosity= a for z<=zo

Porosity= b for z>zo

Since Kinematic Diffusivity = Porosity*Binary Diffusion

Binary diffusion is taken from an empirical formula. Any ideas?

Thank you


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