[kumar2]

Hi Niels and all Foamers,

I have a question on modifying the linearSpring class when applying to floating bodies in waveDyMFoam. I am trying to modify linearSpring.C
so that the code sees the finite volume mesh and can access all points in it.

I did the following modifications in linearSpring.C and was able to make the
modified dynamic library, mylibforcesNEW.so.
///////////////////////////////////Modifications to linearSpring.C //////////////
const objectRegistry& db();
const volVectorField& U = db().lookupObject<volVectorField>("U");
const fvMesh & mesh = U.mesh();
const pointField & pp = mesh.points(); // Thanks to Niels post
(http://www.cfd-online.com/Forums/ope...tml#post275193)
/////////////////////////////////////////////////////////
I then used this library in waveDyMFoam by including the
name in system/controlDict. But when I run the solver, I get the following
error
////////RUNTIME ERROR ///////////////
waveDyMFoam: symbol lookup error: /share/gecko/krishnak/OpenFOAM/krishnak-2.1.0/
platforms/linux64GccDPOpt/lib/mylibforcesNEW.so: undefined symbol: _Z2dbv
///////////////////////////////////////

Also the run time error disappears if I do not include lines starting from const volVectorField& U = db().lookupObject<volVectorField>("U");

Any help is welcome. Also if there is a better way to access the mesh within linearSpring.C, please let me know.

Thanks and best regards

Kumar

PS: Runtime include libs for waveDyMFoam:
libs
(
"libOpenFOAM.so"
"libfvMotionSolvers.so"
"mylibforcesNEW.so"
);

[kumar2]

Hi Niels and all,

I was trying to access member function printCoeffs() of class streamFunction from main (waveFoam). In waveFoam, I write,
///CODE BELOW///
Info<< " Coeff = " << Foam::waveTheories::streamFunction.printCoeffs() << nl << endl;

And the error I get is

error: 'streamFunction' is not a member of 'Foam::waveTheories' .


( I checked streamFunction.H where it is given Foam::waveTheories::streamFunction )

Thanks in advance

Kumar

[kumar2]

I posted the wrong error in the post just before !

This is the error...

error: expected primary-expression before '.' token


Thanks again

Kumar

[ngj]

Hi Kumar,

What you are trying does not make sense. You will have to construct the object, before you use the method.

Kind regards,

Niels

[kumar2]

Hi Niels,

Thank so much for your reply. I see what you mean ( for example in createFields.H , i see an example for trubulence, interface, also this link helped me ; http://eprints.soton.ac.uk/200155/1/WorkShopFOAM.pdf) .

I hope I can bug you with one other question: Suppose I create an object of streamFunction class in my main program. I think this object will be another object that will be DIFFERENT from the object (of streamFunction class) created by the waves2foam lib. Am I correct ?(this means there is no way of accessing the object of streamFunction class from main !!)

Best regards

Kumar

[ngj]

Hallo Kumar,

Yes, it will be another, but identical object, if you create it with the same properties. For instance, both the relaxation zones and boundary conditions have separate but identical waveTheory objects.

Besides that, there is no way of accessing the wave theory from the waveFoam-solver, unless you perform a somewhat large re-write of the code.

Kind regards,

Niels