[odellar]

Hi,

I wish to write my own classwith functions that I can call from within an expression in a groovyBC boundary declaration in the 0/U file of a case.

Can I write this class, compile it, then put it in a particular directory where OpenFOAM can access it when called from the 0/U file? And if so, what is the correct location? If not, what is the correct way of adding my own class/functions?

Thanks,
Olie

[gschaider]

Originally Posted by odellar

Hi,

I wish to write my own classwith functions that I can call from within an expression in a groovyBC boundary declaration in the 0/U file of a case.

Can I write this class, compile it, then put it in a particular directory where OpenFOAM can access it when called from the 0/U file? And if so, what is the correct location? If not, what is the correct way of adding my own class/functions?

Thanks,
Olie

That is known as function-plugins (or plugin-functions I keep forgetting how I named it): adding your own functions to the swak-parsers. Have a look at http://openfoamwiki.net/index.php/Co...er_information (the presentation http://openfoamwiki.net/images/c/c0/...rogrammers.pdf starting at slide 102 - of course you'll need to write a PatchValuePluginFunction instead of the FieldValue in that example). Also have a look at the Libraries/functionPlugins in the swak-sources for examples

[MangoMango]

Hi Bernhard,

great feature and a good presentation. I want to make use of this to call an external function from an older cpp file. How can I access the function? (to be correct it is a Fortran 77 based Database I managed it access it by a cpp wrapper. Now I want to implement it to a functionPlugin so that I m able to read out e.g.: Cv by giving the Temp .....I'm not really deep into c++ strukture classes. So it is quite difficult for me. Maybe some little advices would help me to find the right direction.

Best regards,

Alex

...I allready got your game of life sample through. And I try to understand the sample functions in the swak source..but still I don't know where to begin.

[gschaider]

Originally Posted by MangoMango

Hi Bernhard,

great feature and a good presentation. I want to make use of this to call an external function from an older cpp file. How can I access the function? (to be correct it is a Fortran 77 based Database I managed it access it by a cpp wrapper. Now I want to implement it to a functionPlugin so that I m able to read out e.g.: Cv by giving the Temp .....I'm not really deep into c++ strukture classes. So it is quite difficult for me. Maybe some little advices would help me to find the right direction.

Best regards,

Alex

...I allready got your game of life sample through. And I try to understand the sample functions in the swak source..but still I don't know where to begin.

I assume that you want to use your Cv(T) only for postprocessing. If you want to program a new set of thermodynamics to be used during the simulation: then swak doesn't help you.

Anyway: You say you've already got a C++ function that wraps the fortran stuff. So the hard part is already done and the rest can be tackled with a "Talent imitates, genius steals"-approach: Take the sources of the original "Game of life"-function and adapt them:

1. Rename the class to fit your application (also change the name of your function)
2. #Include the header to your wrapper

#include "myCV.h"

3. Assuming that your wrapper function has a signature similar to

double myCV(double CV,int modelParameter1,double modelParameter2);

rewrite in the doStep-method so that the actual action part (leave the administrative-stuff) is something like (I leave the variable names from the original):

forAll(field,cellI) {
    field[cellI]=myCV(old[cellI],42,666.6);
}

4. Throw out all stuff from the original that you don't understand/are obviously useless. Compile often to check that you don't go overboard. The undo of your text-editor is your friend
5. Change the Contributor/Copyright appropriately if you want to pass the result around

[MangoMango]

Thank you very much !! . I will try to implement it and will keep you updated.

Kind regards
Alex

[gschaider]

Originally Posted by MangoMango

Thank you very much !! . I will try to implement it and will keep you updated.

Of course that is if you're interested in the field (it just occurred to me that the title of the thread has "groovyBC". In that case you'd have to write a Plugin for the Patch-Driver. Which is slightly different)

[MangoMango]

Originally Posted by gschaider

Of course that is if you're interested in the field (it just occurred to me that the title of the thread has "groovyBC". In that case you'd have to write a Plugin for the Patch-Driver. Which is slightly different)

...just figured out that I need to modify the thermophysicalModels to implement a new library. So unfortunatly I can't use swak. Sorry that I bothered you with my request. But your advice is still usefull in my currrent issues. Thanks anyway