how to set boundary condition about porous zone

March 21, 2001, 01:25

hi:

I have a problem about the species transport I want to set the species to diffusion in a single direction ,

I try the porous zone,but it just can make the flow to flow in a single direction,it can not make the species to transfer in a single direction

thank you so much

chocheng

March 21, 2001, 20:02

I don't think you can have a diffusion co-efficient which is different in different directions. As far as I'm aware all diffusion co-efficients are isotropic. You can't even set the user defined diffusion co-efficient to have different values in the different co-ordinate directions!

Greg

March 21, 2001, 01:25	how to set boundary condition about porous zone	#1
chocheng Guest Posts: n/a	hi: I have a problem about the species transport I want to set the species to diffusion in a single direction , I try the porous zone,but it just can make the flow to flow in a single direction,it can not make the species to transfer in a single direction thank you so much chocheng

March 21, 2001, 20:02	Re: how to set boundary condition about porous zon	#2
Greg Perkins Guest Posts: n/a	I don't think you can have a diffusion co-efficient which is different in different directions. As far as I'm aware all diffusion co-efficients are isotropic. You can't even set the user defined diffusion co-efficient to have different values in the different co-ordinate directions! Greg

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