[zeinelserfy]

how anyone tried to use columnAverage?as i tried to use it but it does not work properly
or may be i am not defining the function correctly
I used it in order to perform a spatial average in the span-wise direction (z-direction) but the results are not correct.
The function is added to controlDict

{

type         columnAverage;

libs        ("libfieldFunctionObjects.so");

writeControl  writeTime;

patches       (front);

fields        (p pPrime2Mean wallShearStressMean);

}

i have the front plane is normal to z-direction,so i choose the front plane as a patches in the columnAverage function
The result of pPrime2Mean wallShearStressMean are shown below
pPrime



The columnAverage results seems to be incorrect

[agustinvo]

Hi,


where can we access to the source code of that functionObject? Otherwise it is a bit hard to understand how it works

[HPE]

You cant use columAverage for patch fields. wallShearStress is a patch field.

And also, the mesh in spanwise direction should be like blocks put side by side. For example, grid refinement is not allowed.

columnAverage is somewhat improved postChannel utility.

At least these are my understanding.

[M. Nasr]

Originally Posted by Bazinga

Yes, thank you!

The other user-provided tools did not work for me (of6) but the columnAverage function executed by of1906 for of6 cases works like a charm.

edit: i realized that it does indeed work for U and p. However, if I try to average fields such as Q or vorticitiy I get an error saying the fields are not found. Any idea how to fix this issue?

Excuse me, how can you excute of1906 utilities for of6? I want to use columnAverage utility whic is in of2006 in of7.

[Bazinga]

You can install both (or even more versions) simultaneously and apply alias in your bashrc file. Search for something like "install multiple versions of opefoam"

[M. Nasr]

Originally Posted by Bazinga

You can install both (or even more versions) simultaneously and apply alias in your bashrc file. Search for something like "install multiple versions of opefoam"

I already installed 2 versions openfoam-v2006 and openfoam-v7, my question is how to use utility of one version in the other one?
because when I activate both versions in bashrc, openfoam uses only one of them "the one in the last line of the bashrc".

for example, I want to use "columnAverage" utility (which is available in v2006) in v7. Is that possible?

[Bazinga]

Well, you just execute the utility of one version in a folder of a simulation that ran on a different version.

You need to create aliases in your bashrc to switch between versions. Again, just google. Here is the first link that I got when googling where aliases are explained

https://openfoamwiki.net/index.php/I...with_the_Shell

[mary2021]

Originally Posted by arnaupont

Hi everybody,

I think that this tool can be useful for those who are interested in this post.
https://github.com/arnaupv/avgCyclicDir (version 0.9.0).

Main features:
* OpenFoam v1706.
* Cyclic direction is automatically detected.
* It averages all *Mean files (accepts any kind of field).
* A mesh with a unique control volume in the cyclic direction is created. So, sampling tools can be used without problems).
* Fields are saved in postPorcessing/avgCyclicDir/

Main shortcomings:
* Only one cyclic direction is currently allowed.
* Patches are not included (set to 0 by default).
* Sequential (not parallelized).
* The mesh must be structured in the cyclic direction.

As it can be seen in the GitHub repository, the tool is underdevelopment but the results are pretty good! I will highly appreciate your comments and help for addressing the current shortcomings.

I hope it helps!

Arnau

Hi Arnau,

I have compiled your tool on OF4.1, but unfortunately, it is not working for my pipe case. I have simulated a turbulent pipe and mapped the final results on a polar grid so that the mesh is easier for the tool to process. But as I use the command "avgCyclicDir cellPoint", I don't get the proper results. Only the values for U are halved, but no averaging happens. Could you please help me with it? Is there anything I am doing wrong?

Thanks in advance,

Maryam