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periodic set up - cyclicAMI

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Old   April 24, 2020, 08:35
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  #21
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Peter Baskovich
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Ok, let me have another look at it
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Old   May 22, 2020, 05:50
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Franco
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Quote:
Originally Posted by jvinuales View Post
Hi everyone,

I am OpenFOAM newbie, so bear with me!

I am a bit confused about cyclicAMI and how to set it up... I have not been able to find some tutorials that replicate what I am trying to do.

So, I am studying 3D periodic porous structures. Previously, I had access to commercial software (STAR CCM+) and I will have a set up with a single unit cell with periodic conditions in all 3 directions (in the flow direction, a special type of periodic BC which is called "fully developed flow" that allows specifying certain mass flow rate through the boundary). This set up keeps the domain (and thus cell count) very low, which is important as I have to characterize many different geometries (100-1000) every time.

The objective is to replicate this set up in OpenFOAM (if possible). I was thinking cyclicAMI may be the best option, as creating periodic meshes can be challenging for complex geometries (as my case). I will be using simpleFOAM at the moment (with a modified version to account for heat transfer later on)

- Is it cyclicAMI the right choice?
- For the special case of the periodicity in the flow direction, can cyclicAMI be used? how can I specify certain flow through the boundary?
- Once I created the mesh, I just have to modify the following files:
- constant/polyMesh/boundary
- 0/U , 0/p , 0/T ...
Is this workflow correct? what will be correct set up in each file?

Thanks!

Javier
hello javier,
i am looking exactly at the same issue, i want to simulate periodic lattice structures, not gyroids exactly but other lattices.
and want to simulate the steady-state laminar flow inside them and also use the scalarTransport to calculate the RTD in the structure, would it be possible to share a little bit about your knowledge about this?
for the moment i find myself with the simulation without the periodicity and as you can imagine it is too big as a case.... best regards franco.
please do not hesitate to send me a private message if you want to discuss more about the subject!
best regards, and thanks.
franco
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Old   September 18, 2020, 04:47
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Ran Yi
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Originally Posted by bany View Post
What i am expecting is that a fully developed turbulent circular pipe flow with mapped BC. So the wall functions are used. Now, according to your results, there is no turbulence and the U profile is also parabolic.However, i also cannot get a correct turbulent flow in the pipe.
Greetings Bany! Have you found the solution? I just met the same problem as yours. The mean U profile is also like a laminar one rather than a turbulent one.

Thanks,
Ran
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