[sathwik718]

Hello,

I am doing my thesis on "simulation Analysis Model for Non-Newtonian Blood Flow through Femoral Artery and Adjacent Tissue Medium"

I have modeled the artery using solid works then i have added tissue around the artery.In order blood to flow from artery to tissue i need to consider artery as permeable and tissue as porous medium. I do not know how to choose the Physics condition for this model.

Please some one help me in solving this issue.

[azt]

Hi

assign the volume you want to be porous to a separate fluid region.

in the properties window -> type select the drop down menu and change from fluid region to porous region

[sathwik718]

What are the physics values i need to use for artery to make it permeable

[sathwik718]

I tried using multiphase flow but i did not get permeable option.

[me3840]

Why does the tissue to artery interface need to be permeable? If you just make it an in-place interface, that should allow fluid to move from one place to another. The backpressure from the tissue would keep all of the blood from leaving the artery, no?

[sathwik718]

Because artery should allow blood to pass to tissue.Do you want me to attach the file i have done till now?

[sathwik718]

I have attached the screen shots of physics conditions that i have used for my model.

[me3840]

Ah, if you're using VOF things are a little different.

You need to use the wall porosity model, and make the wall porous for one phase and resist another.

[narmada]

Sorry , I didnot get what you are saying ?where do i need ro use wall porosity?

[sathwik718]

That VOF function did not work. What physics do i need to use in order to get inplace as phase permeable.

[sathwik718]

In intersection folder-->inplace when am selecting inplace i am getting baffel interface instead of phase permeable

[me3840]

The function you're looking for is in the wall porosity model if you're using VOF. Turn it on for your phases and then turn your interface to a baffle. It will have phase condition options.

[narmada]

I didnot get the option called phase condition in interface i have only inplace with physics conditions.

[me3840]

Because you have an in-place interface. As I stated earlier, you need to use a baffle interface.

[sathwik718]

Thankyou I think this will help me.

One more question did you go through the word file i have attached in my previous msgs? I donot even know wether am using correct physcs or not because i am not sure wether i should create phases or not for tissue medium which is porous.I had choosen physcs conditions ramdomly 😔.for artery do i need to create two phase or one phase ?

Thankyou.

[sathwik718]

Hello,

I did the same but the flow is not directed to tissue from artery

[sathwik718]

please see the attached file.See there is no flow directed to tissue from artery . even after making the inplace interface to baffle interface.

[me3840]

Did you set the phase conditions on the interface? A baffle interface with the default settings is just a wall.

You should not be choosing physics randomly. If you want a simulation that has usable results, you need to put thought into what and how you're simulating. As the old CAE saying goes - "garbage in, garbage out".

Using a porous media as the second domain sounds fine to me, I've seen it done before with injection simulations.

[narmada]

I tried using many physics conditions. I tried using VOF model and non VOF but there isn't any result.I donot know exactly what kind of physics i need to use to make it permeable.Yes i did phase condition for interface .

[me3840]

If you set the phase conditions on each side of the interface to be porous, the phase should move through the interface.