porous walls

lplnugd · October 17, 2015, 18:42

I made a model of a blood vessel.
But do not know how it can be porous walls that flow through the walls to be absorbed.

Help me please.
Thank you

fluid23 · October 21, 2015, 14:48

What do you mean by 'walls that flow through the walls'? That is very confusing to me.

In most software packages you can define a porous region or body that has a fixed porosity and pressure drop characteristics.

However, I would suspect that if you have ONLY a blood vessel you are looking to add a mass flux or mass source that accounts for the addition of some other fluid.

Again, your question is VERY confusing.

Steffen595 · October 22, 2015, 00:16

you would have to model 2 domains. The porous skin/vessel and the inner fluid (blood). Then one boundary condition to the outside of the porous skin and inlet/outlet for the blood.
Since when are blood vessels porous, count Dracula?

lplnugd · October 22, 2015, 17:12

Exactly I mean porous skin.
I want to make porous skin that is flow out of the vessel.
But I do not know how I can make a porous skin.
Please tell me the steps.

Steffen595 · October 23, 2015, 05:11

you have to make a multisolid part. One central part ( the blood) and one shell, like a maccaroni, for the porous skin. I suppose most of the blood flows through the vessel and just a tiny bit goes through the skin. So the blood is the fluid with inlet and outlet condition. The maccacroni will be the porous domain. The outer surface of the maccaroni will be nother outlet.
How to set up a porous domain, there is a tutorial of a catalytic converter.
What system? Ansys?

lplnugd · October 23, 2015, 08:56

my system is ansys!
but I made my model and I don't have enough time to make another model!
is that another way?

Steffen595 · October 23, 2015, 16:54

Whats the model like?
If you have a 3d CAD (and did not do the model in ANSYS), then can't you just make an offset surface and then split the solid?
then there is a ANSYS tutorial of a catalytic converter with porous domain, this should give you an idea.
Try with a simple model first to get your porosity settings right

October 17, 2015, 18:42	porous walls	#1
lplnugd New Member ali Join Date: Oct 2015 Posts: 4 Rep Power: 10	I made a model of a blood vessel. But do not know how it can be porous walls that flow through the walls to be absorbed. Help me please. Thank you

October 23, 2015, 16:54		#7
Steffen595 Senior Member Join Date: May 2012 Location: Melbourne Posts: 161 Rep Power: 13	Whats the model like? If you have a 3d CAD (and did not do the model in ANSYS), then can't you just make an offset surface and then split the solid? then there is a ANSYS tutorial of a catalytic converter with porous domain, this should give you an idea. Try with a simple model first to get your porosity settings right Last edited by Steffen595; October 24, 2015 at 07:31.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Porous media setup issues in Fluent	Bernard Van	FLUENT	29	January 26, 2017 04:09
Friction at walls between porous zones	roupcik	FLUENT	0	April 22, 2013 01:41
Friction at walls between porous zones	roupcik	Main CFD Forum	0	April 22, 2013 01:40
Porous wall boundary condition in LES	Henrik	FLUENT	0	May 31, 2007 06:17
Testing the integrity of POROUS media and por jump	Azman	FLUENT	0	July 31, 2006 11:11

October 21, 2015, 14:48		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	What do you mean by 'walls that flow through the walls'? That is very confusing to me. In most software packages you can define a porous region or body that has a fixed porosity and pressure drop characteristics. However, I would suspect that if you have ONLY a blood vessel you are looking to add a mass flux or mass source that accounts for the addition of some other fluid. Again, your question is VERY confusing.

October 22, 2015, 00:16		#3
Steffen595 Senior Member Join Date: May 2012 Location: Melbourne Posts: 161 Rep Power: 13	you would have to model 2 domains. The porous skin/vessel and the inner fluid (blood). Then one boundary condition to the outside of the porous skin and inlet/outlet for the blood. Since when are blood vessels porous, count Dracula?

October 22, 2015, 17:12		#4
lplnugd New Member ali Join Date: Oct 2015 Posts: 4 Rep Power: 10	Exactly I mean porous skin. I want to make porous skin that is flow out of the vessel. But I do not know how I can make a porous skin. Please tell me the steps.

October 23, 2015, 05:11		#5
Steffen595 Senior Member Join Date: May 2012 Location: Melbourne Posts: 161 Rep Power: 13	you have to make a multisolid part. One central part ( the blood) and one shell, like a maccaroni, for the porous skin. I suppose most of the blood flows through the vessel and just a tiny bit goes through the skin. So the blood is the fluid with inlet and outlet condition. The maccacroni will be the porous domain. The outer surface of the maccaroni will be nother outlet. How to set up a porous domain, there is a tutorial of a catalytic converter. What system? Ansys?

October 23, 2015, 08:56		#6
lplnugd New Member ali Join Date: Oct 2015 Posts: 4 Rep Power: 10	my system is ansys! but I made my model and I don't have enough time to make another model! is that another way?