[quarkz]

Hi,

I need to generate many cases of OF to generate training data for machine learning. I need to vary the input conditions such as p, U and T. Is there anyway I can do this more or less automatically?

For e.g. U from 20 to 100 in intervals of 5, p ...., T ...

I found that there's an addon call PyFoam which seems to be able to do what I want, but it seems to work for OF v2x. Does anyone know if it works for newer OF versions?

Thanks!

[Carlo_P]

Hey,
you can use two way.
The first way is to use pyFoamCleanBoundiary file patch value to change the value in the file. (I'm not sure about the name, check the correct spelling)
For example, if you want to Inlet velocity to 0.001, you have to write pyFoamCleanBoundiary 0/U Inlet 0.001


Another way is to store somewhere a file with partcilolar key word, instead of number.
Such as, in the U file,


value velocity ;


and then run a bash or python or C file with a for cicle that copy the file in you folder and change the keyword velocity with your desidered value.


Example in shell

for i velocity1 velocity2 velocity3

do
cp directory/U directory/0/U
sed "../velocity/velocit1" 0/U

done


very raw description..
If you have more questions, feel free to ask.
Cheers,
Carlo

[Carlo_P]

pyFoamClearBoundaryValue.py


pyFoamClearBoundaryValue.py -help
Usage
=====
pyFoamClearBoundaryValue.py [options] <fieldfile> <patchnames>

Takes a field-file and makes the whole internal field uniform. Either taking
the value from a patch or using a user-specified value

[Carlo_P]

sed -i "s/massValue/$i/g" 0/U


the correct way to run sed in bash

[quarkz]

Hi Carlo_P, thanks for the info! I'll give it a try.