[mizzou]

Dear friends,

I am so overwhelmed in my problem and I cannot figure out after spending too much time. I would more than appreciate if anyone could please provide me any comment how to solve that. I used to apply the solver interFoam to simulate air-water two-phase flow inside a 2D pipe (which is a simple rectangular channel). Now, I want to add a porous zone inside that old domain. In other words, I should have a secondary rectangular inside the bigger one while the walls of the inner one should be permeable. I have attached the schematic of what I am saying hereby. I really don't know how to create my second domain inside the main one.
Any help is highly appreciated.

Thank you,

[Phicau]

Hi Milad,

you can try olaFlow ( https://sites.google.com/view/olaflowcfd/ ).

You can add a porous medium inside your domain easily with setFields, and define the porosity, mean grain size (D50) and linear and nonlinear drag coefficients. Check out the CR35_dambreak tutorial.

Best,

Pablo

[mizzou]

Originally Posted by Phicau

Hi Milad,

you can try olaFoam ( https://sites.google.com/site/olafoamcfd/ ).

You can add a porous medium inside your domain easily with setFields, and define the porosity, mean grain size (D50) and linear and nonlinear drag coefficients. Check out the CR35_dambreak tutorial.

Best,

Pablo

Pablo,

Thank you so much for the reply and information. As I am new to OpenFOAM, I am not familiar with olaFoam. I thought I can use porousInterFoam to deal with multiphase flow and porous medium. I will study about olaFoam to figure out.
About creating the porous medium with setFields, I thought setFields just create a certain domain at initial time. Am I wrong?
And also, I do not want to create a porous area. Actually what I need is an inner rectangular with permeable edges. Still I can make that with setFields? Because I thought I should use topoSet utility to make that.

Again, I do appreciate for your help.

Thanks

[Phicau]

Hi Milad,

with setFields you create an initial condition, so if the field (porosity) is not meant to change during the simulation, it will remain the same.

I actually though that you were aiming to set a porous zone. If you want a wall instead, you can still create it this way, but your wall would need to be at least one cell thick.

Probably what will work better for you is a porous baffle, you can find info in the forum about that.

Best,

Pablo

[mizzou]

Originally Posted by Phicau

Hi Milad,

with setFields you create an initial condition, so if the field (porosity) is not meant to change during the simulation, it will remain the same.

I actually though that you were aiming to set a porous zone. If you want a wall instead, you can still create it this way, but your wall would need to be at least one cell thick.

Probably what will work better for you is a porous baffle, you can find info in the forum about that.

Best,

Pablo

Pablo,

Your great response and info are highly appreciated. I will look for porous baffle for sure.

Thank you!