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How to customize a library and link it to present case

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Old   June 29, 2022, 03:49
Default How to customize a library and link it to present case
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Mehdi Badri
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Hi there,

I would genuinely appreciate it if you could help me on this issue:

I am going to solve an FSI problem with a modified version of rigidBodyDynamics library. To start, I just copied its directory somewhere:

Code:
 
cp -r  $FOAM_SRC/rigidBodyDynamics $FOAM_RUN/MyrigidBodyDynamics
and changed the last line of the Make/files to:

Code:
LIB = $(FOAM_USER_LIBBIN)/libMyrigidBodyMeshMotion
Then using wmake I complied this new(!) library into $(FOAM_USER_LIBBIN) directory.

Now the question is how I can use this new library in my cases. When I set the constant/dynamicMeshDict as

Code:
 
dynamicFvMesh        dynamicMotionSolverFvMesh;
motionSolverLibs    ("path_to_the_lib/libMyrigidBodyDynamics.so");
motionSolver             rigidBodyMotion;
...
the OpenFoam can seemingly find my new motionSolverLibs but it has some problems with motionSolver as it complains:

Code:
 
--> FOAM FATAL IO ERROR: (openfoam-2112)
Unknown solver type rigidBodyMotion

Valid solver types :
6(coded displacementInterpolation displacementLayeredMotion multiSolidBodyMotionSolver solidBody velocityDisplacement)
Is there any way to make it use the new library?
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Old   June 29, 2022, 04:42
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Mark Olesen
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I must be missing something here, you want to load rigidBodyMotion from librigidBodyMeshMotion automatically required through your libMyrigidBodyDynamics ?
Did you actually add that as compile option somewhere (eg, LIB_LIBS) and it didn't work, or something else? Really confused here.
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Old   June 29, 2022, 05:38
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Are yoou sure, that you used the correct libname? Because you have written you renamed the library to "libMyrigidBodyMeshMotion" but you are loading "libMyrigidBodyDynamics" ??


If this isnt the case I would try $(FOAM_USER_LIBBIN)/libMyrigidBodyMeshMotion.so


But these are just guesses, never worked with that before
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Old   June 29, 2022, 23:50
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Mehdi Badri
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Quote:
Originally Posted by olesen View Post
I must be missing something here, you want to load rigidBodyMotion from librigidBodyMeshMotion automatically required through your libMyrigidBodyDynamics ?
Did you actually add that as compile option somewhere (eg, LIB_LIBS) and it didn't work, or something else? Really confused here.
Thank you for your reply.
You are right! I had forgotten to compile libMyrigidBodyDynamics.so. Thus both the situation and my question were confusing. After getting the comments, I figured out what the problem was. Thanks.
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Old   June 29, 2022, 23:58
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Mehdi Badri
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Quote:
Originally Posted by überschwupper View Post
Are yoou sure, that you used the correct libname? Because you have written you renamed the library to "libMyrigidBodyMeshMotion" but you are loading "libMyrigidBodyDynamics" ??


If this isnt the case I would try $(FOAM_USER_LIBBIN)/libMyrigidBodyMeshMotion.so


But these are just guesses, never worked with that before
Thank you. The issue you pointed out was not exactly the problem, but it was very constructive.
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