Changing viewfactor Model and use the changed my model by calling "mySolver"
 

Hello,


here is what I am trying to do:

• I want to manipulate the viewFactor Model, especially the viewFactor.C file
• I want to keep every part of my programming strictly seperated from the original source code
• before I start a simulation I would like to be able to decide in a simple manner if the changed code or the original code is used
• right now the approach I have chosen is explained below

Approach:

• copied the content of radiationModels to the user directory myRadiationModels
• changed the viewFactor.C file, in such a way that it will just show some recognizable output on the terminal
• changed the Make-files, files and options

Files:
Options:

• compiled it into a new library using wmake libso
• copied the contents of the buoyantSimpleFoam solver to myBuoyantSimpleFoam solver
• changed the Make-files to the ones below

files
options

• compiled with wmake

Result:

• actually this approach does work, calling buoyantSimpleFoam uses the original source code, myBuoyantSimpleFoam the changed one of libmyRadiationModels
• but a lot of warnings are generated, which are all of the same structure, therefore I only put a few of them in here:

=> I would like to understand what these warnings are telling me and how to get rid of them. Who can help? A suggestion of a totally different approach would be fine as well.


Please consider in your answer, that my OF and C++ knowledge is just on a beginners level. So I am thankful for any explanation that goes a little beyond the actual problem and extends my general knowledge about OF and compiling with wmake. I read the openFoam userguide and googled about wmake and make in c++, but so far I just have some sort of idea what the problem could be, but can not find a solution.

Thanks in advance for your efforts,
Regards

Fabian

Hello there.

What appears to be happening is that the original library (or parts of it) are being linked in the solver as well as your new library. There are two entries in the runTime selection table that have the same name (in the case of the error you posted, its the absorptionEmission model).

Try changing the options file for your new solver either by:

1. Remove - OR -

2. Specify the full path for your custom library, ie You may even have to do both. What I suspect is that the first line is adding all the libraries in $(FOAM_USER_LIBBIN), and then you are specifying the same library again with the second. Just a guess at this point

Hi Marco,

Thank you for dealing with my problem.
I tried your solution suggestions, but they would not do the trick.

But I guess you are hinting in the right direction. One of the included lnIncludes of the solver already seems to include the unchanged radiation model. That is why the type definitions ("TypeName") appear twice if my model is added as well.

I have solved the problem now with a different approach, analogue to this one:

http://www.tfd.chalmers.se/~hani/kur...lenceModel.pdf

This approach is already mentioned in the Forum, from the guys who deal with turbulence modelling.

So I only compiled a "myViewfactor" folder into a "myLibrary", after I had changed TypeName viewFactor and every appearance of viewFactor into myViewfactor in the files.
Now I can include the "myLibrary" in the controlDict, and by using "myViewFactor" in the viewFactorControlDict I can switch to my model.

So I can't switch by choosing a different solver, but by editing two lines in a dictionary, which is a sufficient solution for me.

Thanks again to you