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Vortex induced Vibrations

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Old   July 28, 2014, 08:01
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Amit Dhage
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Dear Araujo,

Do i need to input constraints for my body in dynamicMeshDict file?, because the same i had already inputed in pointDisplacement file.
Pls suggest.

Thanks and Regards,
Amit Dhage
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Old   July 28, 2014, 14:30
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Leonardo Antonio de Araujo
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Quote:
Originally Posted by Amit-1911 View Post
Dear Araujo,

Do i need to input constraints for my body in dynamicMeshDict file?, because the same i had already inputed in pointDisplacement file.
Pls suggest.

Thanks and Regards,
Amit Dhage
Which openfoam version are you using? This varies from version to version.
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Old   July 28, 2014, 15:01
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Amit Dhage
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I am using version 2.2.2
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Old   July 28, 2014, 15:50
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Originally Posted by Amit-1911 View Post
I am using version 2.2.2
Check out the pointDisplacement file. I believe there is something wrong with your constraints.
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Old   July 29, 2014, 00:50
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Amit Dhage
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Dear Araujo,

I have checked the constraints many a times and really not finding any clue,
can you pls check the same file i am attaching herewith and suggest something.

Regards,
Amit Dhage
Attached Files
File Type: txt pointDisplacement.txt (2.5 KB, 47 views)
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Old   July 29, 2014, 05:35
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Quote:
Originally Posted by Amit-1911 View Post
Dear Araujo,

I have checked the constraints many a times and really not finding any clue,
can you pls check the same file i am attaching herewith and suggest something.

Regards,
Amit Dhage
Center of mass on (0,0,0)? Is that correct? It is important to notice that the center of mass of the cylinder is referred relative to the domain position (your mesh).
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Old   July 29, 2014, 05:50
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Amit Dhage
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Dear Araujo,

The centre of mass is specified w.r.t global coordinate system, and the domain is also specified w.r.t global coordinate system. Is this correct?

regards,
Amit Dhage
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Old   August 21, 2014, 07:48
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Dear Amit,

my pointDisplacement file is attached. I hope that would be help.

All the best.
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Old   August 21, 2014, 07:50
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Sorry there is attached problem. Here it is

/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.0 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class pointVectorField;
location "0.01";
object pointDisplacement;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 0 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
cylinder
{
type calculated;
value uniform (0 0 0);
}

top
{
type empty; //symmetry;
}

bottom
{
type empty; //symmetry;
}

walls
{
type slip; //symmetry;
}


".*"
{
type fixedValue;
value uniform (0 0 0);
}
}


// ************************************************** *********************** //
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Old   August 21, 2014, 12:58
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Amit Dhage
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Dear Maimouna,

Thanks for your reply!

Are you able to produce results with point displacement file you sent to me?, since you have not imposed any constraints on the body, if so then i will try with the same.

Thanks and regards,
Amit Dhage
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Old   August 22, 2014, 06:21
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Dear Amit,

constraints and resistance are imposed in dynamicMeshDict file. I'm still working on that to get the result.

Regards
Maimouna
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Old   August 22, 2014, 06:33
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Amit Dhage
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Dear Maimouna,

I am not sure if that will work, because if you go through the tutorial of Wing motion...constraints and restraints are set in PointDisplacement file and not in dynamicMeshDict file.

Thanks and regards,

Amit Dhage
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Old   August 22, 2014, 06:47
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Dear Amit,

you are right if you are using OF-2.2.2, but I'm using OF-2.3.0. So you will find the difference.

All the best.
Maimouna
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Old   August 22, 2014, 07:10
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oh is it?, then its fine...let me know if it works successfully.

Thanks and regards,
Amit Dhage
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Old   August 27, 2014, 07:07
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Dear Leonardo,

what are your stiffness and damping values that you used in your case?

What about displacement? Where exactly did you set that?

Could you please provide us by that information to make more clarification.

Thanks and regards.

Maimouna
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Old   September 16, 2014, 03:24
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Alireza Heidari
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Quote:
Originally Posted by Amit-1911 View Post
Dear Araujo,

I have checked the constraints many a times and really not finding any clue,
can you pls check the same file i am attaching herewith and suggest something.

Regards,
Amit Dhage
dear Amit
i have run with your pointDisplacement file and the result shown the cylinder is stationary in different Re number (Re=100,150,200)
did you have same problem? and what did you do?
Thanks & regards
Alireza Heidari
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Old   November 23, 2017, 13:43
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Naeem Ur Rahman
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Quote:
Originally Posted by araujo View Post
Dear Amit,

I believe it has something to do with the "constraints" on your dynamicMesh dictionary. Check out if you set up the right axes and lines for your body to move.
Sir how you are simulating this project, with fluent and transient structural. If so then what constraint are you using for transient structural?

Thanks, please help me
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