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Problem with rotatingMotion OpenFOAM 2.2.2

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Old   November 19, 2013, 14:02
Default Problem with rotatingMotion OpenFOAM 2.2.2
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Dear all,
I am currently investigating flowfield around a rotating cylinder using pimpleDyMFoam. My current mesh setting is like this:
Capture.jpg

I have provided a side view. The cylinder is rotating around z axis. The rotational motion is given using rotatingMotion function of OpenFOAM. The rotatingMotionCoeffs setting of the function is stored in constant/dynamicMeshDict folder like this:
rotatingMotionCoeffs
{
origin (0 0 0);
axis (0 0 1);
omega -54.1401134; // deg/s
}
As far as I could understand from the source code is that:
origin- CofG of the cylinder
axis- The rotational axis
omega- scalar value of the angular speed
This settings worked perfectly fine for me.
Now I want to perform some tilted simulations. The rotational axis is tilted with respect to z-axis in 10 degree. I am attaching the mesh settings:
Capture1.jpg

I have modified the settings like following:
rotatingMotionCoeffs
{
origin (0.043412044 0 0.24620194);
axis (0.17364818 0 0.98480775);
omega -54.1401134; // deg/s
}
But unfortunately it is not working. I have used the following picture to assess origin and axis:
Capture2.JPG

I could not understand the reason. After sometimes to be precise 30 degree the simulation crashes saying overlapping AMI.
I think I am wrongly defining the axis vector. I have also used some other points for trial and error purpose. Pictures are given below:
Capture7.JPG
Capture9.JPG
But all of them failed. Could anyone give me a hint about that?
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Old   November 21, 2013, 09:01
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Nima Samkhaniani
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i guess you choose solid body motion in your Dict so its reasonable , that the whole frame rotate
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Old   November 21, 2013, 23:14
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So what is your suggestion? What should I do?
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Old   November 22, 2013, 04:16
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well, i think you need to create a circle around your box and rotate the the circle, look at this
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Old   November 22, 2013, 05:13
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Actually that's exactly what I did. I am attaching some snapshots. The rotating part:

Rotating Part
Capture.JPG
The whole computational domain:
Capture1.jpg

Please note that. when the cylinder is upright it just works fine. But when it is tilted it does not work.
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Old   November 28, 2013, 09:29
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Is there anyone?
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Old   November 28, 2013, 09:33
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Nima Samkhaniani
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well, i guess you need to use structure mesh, as it uses a mapping features to exchange data between rotating part and rest domain
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Old   November 28, 2013, 11:03
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Hmm very interesting. I also thought of doing that. I would keep this post updated. thank you
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