Permeability through Polyethylene

juanmariacg · January 21, 2013, 06:44

Dear all,

I am involved in a research project about poliethylene.

I want to simulate, with CFX, how water vapor go troughout an polyethylene film.

I've thinked doing with "porous domain" but I am not sure that is the most corret approach to the problem,

can somebody help me?

thank you very much in advance!

evcelica · January 21, 2013, 21:19

This sort of molecular permeability is very slow. It would be governed by Fick's Laws which are analugous to the Fourier Heat equation. You could model it as an additional variable through a solid domain, or do some analytical calculations. Its not going to "flow" like fluid through a porous domain.

January 21, 2013, 06:44	Permeability through Polyethylene	#1
juanmariacg New Member Juan Campos Join Date: Oct 2010 Posts: 12 Rep Power: 16	Dear all, I am involved in a research project about poliethylene. I want to simulate, with CFX, how water vapor go troughout an polyethylene film. I've thinked doing with "porous domain" but I am not sure that is the most corret approach to the problem, can somebody help me? thank you very much in advance!

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January 21, 2013, 21:19		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,188 Rep Power: 23	This sort of molecular permeability is very slow. It would be governed by Fick's Laws which are analugous to the Fourier Heat equation. You could model it as an additional variable through a solid domain, or do some analytical calculations. Its not going to "flow" like fluid through a porous domain.