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-   -   Wind Turbine Similation (http://www.cfd-online.com/Forums/openfoam-solving/88216-wind-turbine-similation.html)

Seg-Far May 11, 2011 08:54

Wind Turbine Similation
 
Hye everyone.
I am a new user who just started with OpenFoam 1.7.1 recently. I am trying to simulate with the k-epsilon model the flow over a wind turbine vertical (VAWT) .

The meshing is a non structural mesh realised with salome.
I would like to have some help for the choose of the solvers:

i read in the tutorial that the MRFSImple or simplSRF are betters for this kind of simulation.
Wich one choose?

Then, i hope to realise a dynamical simultaion wind a blade and a body who turn.
That why i need to define a Ggi interface . THe problem is that, i dont find the ggi commande in openFOam 1.7.1.

MRFZONES:
1
(
pales
{
wall (pales);

origin origin [0 1 0 0 0 0 0] (0.4 0 0);
axis axis [0 0 0 0 0 0 0] (0 0 1);
omega omega [0 0 -1 0 0 0 0] 50;
}
)

dynamicsMeshDict:
dynamicFvMeshLib "libtopoChangerFvMesh.so";

dynamicFvMesh mixerGgiFvMesh;

mixerGgiFvMeshCoeffs
{
coordinateSystem
{
type cylindrical;
origin ( 0 0 0 );
axis ( 0 0 1 );
direction ( 1 0 0 );
}

rpm 477;

slider
{
moving (ggiInside);
static (ggiOutside);
}
}

SOme Help Please.

taner May 12, 2011 07:20

Hi Seg,
my experience is that MRFSimpleFoam works better than SimpleSRFFoam.
And you have to install the extended version to use GGI, e.g. openfoam-1.6-ext.
Taner

Seg-Far May 16, 2011 05:37

Quote:

Originally Posted by taner (Post 307340)
Hi Seg,
my experience is that MRFSimpleFoam works better than SimpleSRFFoam.
And you have to install the extended version to use GGI, e.g. openfoam-1.6-ext.
Taner


Thanks for your reply.

I didn't know , if it's poosbille to install a extended version of OPENFOAM 1.6 knowing that i use OPENFOAM 1.7.

Are there a other means thanks to OPENFOAM 1.7.1, to define a rotating mesh?
I would like to realise a simulation like that:
http://www.youtube.com/watch?v=1xZ3W3ST1Lo

As you see there are a party that leads the movement to another. With the tools dynamicsMeshdict is not possible to define that?
Farid

Ruli January 24, 2014 06:43

Quote:

Originally Posted by Seg-Far (Post 307194)
Then, i hope to realise a dynamical simultaion wind a blade and a body who turn. That why i need to define a Ggi interface.

Dear Seg-Far,
as I understand, you also can simulate a non-rotating nacelle and a rotating blade with MRFSimpleFoam, so you don`t have to use GGI.

Bye
Julian


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