OpenFOAM external imposed displacement

JulianSch · May 28, 2021, 08:05

Hello everyone,

I am trying to couple my OpenFOAM model to a FSI solver.
My aim is to pass a rotation movement from the FSI solver to OpenFOAM.
Therefore I have first tried a simple displacement, which worked pretty well:

Next moving to a rotation movement.
First I wanted to make a rotational movement around the bottom of the airfoil. I have plottet the vectors I am giving from python to OpenFOAM via preCICE with matplotlib.
The problem I am facing is, that the points I am trying to displace in different speed and direction are deforming the arifoil and do not result in a rotation motion:

Is there anything obvious I could make wrong?
For the FSI solver, I have set the mesh vertices to:

Code:

[[0.32, -0.105],[0.32, 0.016 ],[0.32, 0.097]]

which are three points in the airfoil I have picked with paraview: The first one at the bottom, second somewhere in the middle and the third at the top of the airfoil.

The full case is available here.
If you need any other data, please let me know in the comments.

JulianSch · May 31, 2021, 03:29

Update: Adding more points to the mesh of the solid simulation solved the issue.

May 28, 2021, 08:05	OpenFOAM external imposed displacement	#1
JulianSch New Member Julian Join Date: May 2021 Posts: 3 Rep Power: 4	Hello everyone, I am trying to couple my OpenFOAM model to a FSI solver. My aim is to pass a rotation movement from the FSI solver to OpenFOAM. Therefore I have first tried a simple displacement, which worked pretty well: Next moving to a rotation movement. First I wanted to make a rotational movement around the bottom of the airfoil. I have plottet the vectors I am giving from python to OpenFOAM via preCICE with matplotlib. The problem I am facing is, that the points I am trying to displace in different speed and direction are deforming the arifoil and do not result in a rotation motion: Is there anything obvious I could make wrong? For the FSI solver, I have set the mesh vertices to: Code: [[0.32, -0.105],[0.32, 0.016 ],[0.32, 0.097]] which are three points in the airfoil I have picked with paraview: The first one at the bottom, second somewhere in the middle and the third at the top of the airfoil. The full case is available here. If you need any other data, please let me know in the comments.

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May 31, 2021, 03:29		#2
JulianSch New Member Julian Join Date: May 2021 Posts: 3 Rep Power: 4	Update: Adding more points to the mesh of the solid simulation solved the issue.