How to define diffusivities in Fuel cell Model

February 17, 2007, 17:30

Hi, I am modeling PEMFC, and I am trying to define diffusivities for species. Species have different diffusivities in different zones. How do I use macro "DEFINE_DIFFUSIVITY" to define them in different zones? And how much are diffusivities of water and nitrogen? Who can give me an example? Thank you! braket

February 17, 2007, 19:08

In addition, I only find the diffusivities of oxygen, hydrogen in literatures, but water and nitrogen diffusivities can not be found. how do you define and input them in fuel cell model? Thank you very much!

February 17, 2007, 17:30	How to define diffusivities in Fuel cell Model	#1
braket Guest Posts: n/a	Hi, I am modeling PEMFC, and I am trying to define diffusivities for species. Species have different diffusivities in different zones. How do I use macro "DEFINE_DIFFUSIVITY" to define them in different zones? And how much are diffusivities of water and nitrogen? Who can give me an example? Thank you! braket

February 17, 2007, 19:08	Re: How to define diffusivities in Fuel cell Model	#2
braket Guest Posts: n/a	In addition, I only find the diffusivities of oxygen, hydrogen in literatures, but water and nitrogen diffusivities can not be found. how do you define and input them in fuel cell model? Thank you very much!

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