[Naruto]

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?

[nimasam]

i guess you choose solid body motion in your Dict so its reasonable , that the whole frame rotate

[Naruto]

So what is your suggestion? What should I do?

[nimasam]

well, i think you need to create a circle around your box and rotate the the circle, look at this

[Naruto]

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.

[Naruto]

Is there anyone?

[nimasam]

well, i guess you need to use structure mesh, as it uses a mapping features to exchange data between rotating part and rest domain

[Naruto]

Hmm very interesting. I also thought of doing that. I would keep this post updated. thank you