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Only water pass through with cyclic boundary

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Old   July 7, 2015, 05:30
Unhappy Only water pass through with cyclic boundary
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kkk
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kenyoh
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Hi

I would like to make a custom cyclic boundary with that only water pass through.
Actually I know how I should do. U times alpha should be set as cyclic boundary value instead of U.
I tried to use fan boundary by reference. but It seems that fan boundary couldn't set to vectorField U boundary.
I had no longer know what to do.
Please help me.

Regard,
kkk

Last edited by kkk; July 8, 2015 at 03:14.
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Old   July 7, 2015, 07:13
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Dongyue Li
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Hello,

Do u wanna simulate fully developed turbulence? U can try boundaryFoam. It uses average velocity with two cyclic boundaries. Quite simple and fast

Best,
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Old   July 8, 2015, 03:06
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Hi

Thank you for your helping.
But I couldn't understand your point.

I checked boundaryFoam's sorce code and those tutorials, but I couldn't find any description about customizing cyclic boundary.

I attached some cases that I want to achieve.

Here is a interFoam's simple model condition.
simpleModel.jpg

Following is result with usual cyclic boundary.
airInlet_usualCyclic.gif

But I don't want let air pass through cyclic.(Here I changed cyclic BC to wall BC actually.)
airInlet_idealCustomCyclic.gif

Only water pass through cyclic boundary is my ideal.
waterInlet_idealCustomCyclic.gif

Regards,
kkk
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Old   February 24, 2016, 14:49
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Timucin Kislak
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Hi Kenyoh,

have you found a solution for the boundary conditions? I need exactly the same. But iny my case i want the gas to pass through.


Best regards,
Timucin
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Old   March 21, 2016, 21:56
Default Only water pass through with cyclic boundary
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Hi



My problem has not be solved yet.

I am trying to customize fan boundary.

What I am doing is setting jump_ as -U*alpha, but jump_ seems scalarField and not being set vectorField.

I am modifying valiable's type of jump_ from scalarField to vectorField in JumpCyclic and fixedJump. Actually, it has not be working well yet.
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Old   March 22, 2016, 02:13
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Timucin Kislak
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Hi kenyoh,

i don't know if this thread could help you, but take a look at it:

http://www.cfd-online.com/Forums/ope...condition.html


Best regards,
Timucin
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Old   March 22, 2016, 02:57
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Hi Timucin

Thank you for your giving me some informations.

I think your article is the almost same what I want to achive.
Actually, I have to consider also region outside of boundary. so, I have to use custome cyclic.
I am checking custome cyclic boundarys of OFv30+. I wonder if there are some custome cyclic dealing vectorField jump or something...
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custom cyclic boundary, interfoam, only water pass through, openfoam 2.1.x

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