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[waves2Foam] Mooring Lines waves2Foam How To

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Old   July 16, 2018, 11:24
Default Mooring Lines waves2Foam How To
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Mohamad
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Dear all,

I have managed to model the mooring lines using waves2foam using OFv2.3.x. I combine the interDyMFoam and waveFoam solver (waveDyMFoam) and use this solver for my case (floatingObject+waveFlume tutorials). You can find the guide on how to compile waveDyMFoam in this forum. For this post, I will only explain how to use the mooring lines in waves2foam. 1st you need to compile the waves2foamMooring in the directory $WAVES/src/waves2FoamMooring. I only made the following changes:

in mooringLine.H, line 88:
delete: const scalar maxAngle_ = 88.0;
paste: scalar maxAngle_;

in mooringLine.C, line 65:
add: maxAngle_(88.0),
below the line: nCells_(101),

Compile using wmake.

Then, in constant/dynamicMeshDict make the following changes:

dynamicFvMesh dynamicMotionSolverFvMesh;
motionSolverLibs ("libwaves2FoamMooring.so");
solver sixDoFRigidBodyMotion;
...
restraints
{
mooringLine1
{
sixDoFRigidBodyMotionRestraint mooringLine;
anchor (24 16 0); // anchor point
refAttachmentPt (28 18 8); // attachment to the floatingObject
massPerLength 950; // mass per unit length
lineLength 10; //length of mooring line
gMag -9.81; // gravity magnitude
gravityVector (0 0 1);
unitVert 10; // unit vertical, vertical length, not sure
mooringState simpleState; // or restingState or hangingState
}
}

in the system/controlDict add the following lines:

libs
(
"libwaves2FoamMooring.so"
);



Cheers,
Mohamad
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Old   July 17, 2018, 07:53
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Hi Niels,

I've managed to use the mooring lines in waves2foam.

But I still don't know how to visualize the mooring lines in Paraview. What else should I add to the dynamicMeshDict and/or controlDict?

Last edited by wyldckat; August 17, 2018 at 17:57.
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Old   September 12, 2018, 09:39
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金恒
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Quote:
Originally Posted by mhasif02 View Post
Hi Niels,

I've managed to use the mooring lines in waves2foam.

But I still don't know how to visualize the mooring lines in Paraview. What else should I add to the dynamicMeshDict and/or controlDict?
hi Mohamad,
did you find any way to visualize the mooring lines in Paraview?
thanks for your any tips
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Old   September 13, 2018, 12:26
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Niels Gjoel Jacobsen
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Hi all,


If the 'breeder' part of waves2Foam is compiled correctly, then there should be a utility called 'writeMooringLines'. This writes a 1D mesh of the mooring lines, which can be visualised with ParaView.


Kind regards,


Niels
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Old   September 16, 2018, 12:50
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Quote:
Originally Posted by ngj View Post
Hi all,


If the 'breeder' part of waves2Foam is compiled correctly, then there should be a utility called 'writeMooringLines'. This writes a 1D mesh of the mooring lines, which can be visualised with ParaView.


Kind regards,


Niels
hi Niels,

I have a problem that “keyword thickness is undefined in dictionary "/home/jd2018/OpenFOAM/jd2018/v1606+/applications/utilities/waves2Foam/tutorials/waveFoam/waveFlumeDyMFoam/constant/dynamicMeshDict.sixDoFRigidBodyMotionCoeffs.restra ints.mooringLine1"”
while, I did not find any define or scale about the thickness. Can you kindly tell me what's mean of this problem and how to solve that.

Thanks a lot.

sammy
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Old   September 17, 2018, 10:41
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Niels Gjoel Jacobsen
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Hi Sammy,


The thickness has to do with the visual representation of the mooring line, when you use the post-processing tool. E.g. thickness 1, would give a thickness of 1 m, while thickness 0.1 would give a thickness of 0.10 m. Therefore, an appropriate value depends on the dimensions of your problem.


The value of 'thickness' does not affect the physical behavior of the mooring line, because the loading on the mooring line from the surrounding water is not accounted for.



Kind regards,


Niels
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Old   November 8, 2019, 15:47
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Tanvir Sayeed
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Quote:
Originally Posted by jinheng View Post
hi Niels,

I have a problem that “keyword thickness is undefined in dictionary "/home/jd2018/OpenFOAM/jd2018/v1606+/applications/utilities/waves2Foam/tutorials/waveFoam/waveFlumeDyMFoam/constant/dynamicMeshDict.sixDoFRigidBodyMotionCoeffs.restra ints.mooringLine1"”
while, I did not find any define or scale about the thickness. Can you kindly tell me what's mean of this problem and how to solve that.

Thanks a lot.

sammy

It seems like in order to visualize, there are other parameters need to be defined like centreofMass, orientation etc... in dynamicMeshDict file. Can you please share one example to visualize mooring line using writeMooringLines. I will appreciate...
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Old   December 2, 2020, 11:04
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Arun Kumar
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Quote:
Originally Posted by mhasif02 View Post
Dear all,

I have managed to model the mooring lines using waves2foam using OFv2.3.x. I combine the interDyMFoam and waveFoam solver (waveDyMFoam) and use this solver for my case (floatingObject+waveFlume tutorials). You can find the guide on how to compile waveDyMFoam in this forum. For this post, I will only explain how to use the mooring lines in waves2foam. 1st you need to compile the waves2foamMooring in the directory $WAVES/src/waves2FoamMooring. I only made the following changes:

in mooringLine.H, line 88:
delete: const scalar maxAngle_ = 88.0;
paste: scalar maxAngle_;

in mooringLine.C, line 65:
add: maxAngle_(88.0),
below the line: nCells_(101),

Compile using wmake.

Then, in constant/dynamicMeshDict make the following changes:

dynamicFvMesh dynamicMotionSolverFvMesh;
motionSolverLibs ("libwaves2FoamMooring.so");
solver sixDoFRigidBodyMotion;
...
restraints
{
mooringLine1
{
sixDoFRigidBodyMotionRestraint mooringLine;
anchor (24 16 0); // anchor point
refAttachmentPt (28 18 8); // attachment to the floatingObject
massPerLength 950; // mass per unit length
lineLength 10; //length of mooring line
gMag -9.81; // gravity magnitude
gravityVector (0 0 1);
unitVert 10; // unit vertical, vertical length, not sure
mooringState simpleState; // or restingState or hangingState
}
}

in the system/controlDict add the following lines:

libs
(
"libwaves2FoamMooring.so"
);



Cheers,
Mohamad
Hello Mohamad,
Thank you for the explanation of the mooring setup. I was wondering if you have figured out what the term unitVert means and how should one approach it. I am trying to recreate a catenary mooring line but I am not sure what this term is and how to decide what value it should take.
Thanks,
Arun.
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Old   January 31, 2021, 22:03
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Ji
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Quote:
Originally Posted by mhasif02 View Post
Dear all,

I have managed to model the mooring lines using waves2foam using OFv2.3.x. I combine the interDyMFoam and waveFoam solver (waveDyMFoam) and use this solver for my case (floatingObject+waveFlume tutorials). You can find the guide on how to compile waveDyMFoam in this forum. For this post, I will only explain how to use the mooring lines in waves2foam. 1st you need to compile the waves2foamMooring in the directory $WAVES/src/waves2FoamMooring. I only made the following changes:

in mooringLine.H, line 88:
delete: const scalar maxAngle_ = 88.0;
paste: scalar maxAngle_;

in mooringLine.C, line 65:
add: maxAngle_(88.0),
below the line: nCells_(101),

Compile using wmake.

Then, in constant/dynamicMeshDict make the following changes:

dynamicFvMesh dynamicMotionSolverFvMesh;
motionSolverLibs ("libwaves2FoamMooring.so");
solver sixDoFRigidBodyMotion;
...
restraints
{
mooringLine1
{
sixDoFRigidBodyMotionRestraint mooringLine;
anchor (24 16 0); // anchor point
refAttachmentPt (28 18 8); // attachment to the floatingObject
massPerLength 950; // mass per unit length
lineLength 10; //length of mooring line
gMag -9.81; // gravity magnitude
gravityVector (0 0 1);
unitVert 10; // unit vertical, vertical length, not sure
mooringState simpleState; // or restingState or hangingState
}
}

in the system/controlDict add the following lines:

libs
(
"libwaves2FoamMooring.so"
);



Cheers,
Mohamad
Thanks for your share!
Did you try the mooring line in a new version OF and waves2foam? I want to compile them in OFv1912, but the mooringline can not compile.
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Old   May 25, 2021, 04:15
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Carlos Eduardo Simőes de Almeida
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Quote:
Originally Posted by aisy View Post
Thanks for your share!
Did you try the mooring line in a new version OF and waves2foam? I want to compile them in OFv1912, but the mooringline can not compile.

Hello, were you able to compile waveDyMFoam using OF-v1912? I'm getting some strange error when I try to compile this new solver using this version of OF.




Best regards,
Carlos
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Old   August 5, 2021, 05:33
Question waves2FoamMooring compilation on recent OF version
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Hi Carlos and all,
Did you find a way to compile waves2FoamMooring on recent OpenFOAM version ?
I'm very interesting to hear about your solution if you find one.
Thanks in advance for your help !
Best regards,
Alix
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Old   May 17, 2022, 13:45
Default waves2Foam Mooring Lines Foam Extend 4.0
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Jacob Fontaine
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Hello,

I am trying to compile the waves2Foam mooring for FE4.0, however, even after making the changes mentioned in the first post, I am still getting an error message.

I believe it has something to do with polyPatch syntax maybe changing from versions, and something in my dynamicMesh. I am not too sure how to approach fixing this problem, so any help would be appreciated.

I am going to dive into my waveDymFoam solver I have working for FE4.0 and see if I can catch any changes.

Attached is my log file
Attached Files
File Type: txt logMooring.txt (7.8 KB, 17 views)
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