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Creation of boundaryData for turbulentDigitalFilterInlet

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Old   October 13, 2020, 03:49
Default Creation of boundaryData for turbulentDigitalFilterInlet
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I am looking for a way to create patch-profile input for the turbulentDigitalFilterInlet inlet type as mentioned here:

https://www.openfoam.com/documentati...-dfm-fsm-usage

I understand that I can create inlet profiles of the mean velocity and Reynolds stresses. I have the values of the profiles in a csv format but I am not sure how the create the proper files in constant/boundaryData/<patch Name/...
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Old   July 15, 2021, 08:20
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Tom Lauriks
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Hi,


to my understanding, there should be in the patch name dir, a points file. It should contain the coordinates, e.g.:
Code:
(
( -1.5 0 0.0 )
( -1.5 0 0.0015102 )
...
( -1.5 0 0.119958 )
( -1.5 0 0.123124 )
)
I think that the coordinates can be any values, but of course, they do have to fall within your domain. I've used python and linux bash to create scripts that convert my coordinates into a file with the above shown format. Note that these coordinates describe a profile across the height at x=-1.5 and y=0.

Then in patch name/0, there should be a file containing the reynolds stresses - R - (but I believe that you can also define them as uniform across the patch) and a file containing the velocity - UMean - at the points corresponding to the coordinates described in points, e.g. for R I have:
Code:
(
( 0.000000e+00 0.000000e+00 -0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 )
( 7.803253e-02 0.000000e+00 -1.512301e-02 5.737909e-02 0.000000e+00 2.234312e-02 )
...
( 6.004497e-01 0.000000e+00 -1.293823e-01 3.694919e-01 0.000000e+00 2.414780e-01 )
( 5.990021e-01 0.000000e+00 -1.301567e-01 3.693150e-01 0.000000e+00 2.433442e-01 )
)
where you have to follow the format of a symmetric tensor in openfoam (see description here https://www.openfoam.com/documentati...ymmTensor.html). Also the for the R and UMean file, I made scripts in python and linux bash to convert the data that I have, into the format with the brackets.
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