problem with cyclic condition and FSI

Nigò · January 24, 2017, 10:59

Hello Foamers,
I'm trying to symulate a vertical beam a cross flow, where the flow is driven by a volume force and the boundary condition in the fluid domain are cyclic.

I've started from the beamInCrossFlow tutorials in the FSI package fro the foamextended 4 and I succesfully added the source term for the fluid equtions, but I have problems whith the cyclic conditions.

After setting the inlet-outlet cycling bc, when I lunch the fsiFoam solver I get this error:
"""

Code:

Create time

Create dynamic mesh for time = 0

Selecting dynamicFvMesh dynamicMotionSolverFvMesh
Selecting motion solver: displacementLaplacian


--> FOAM FATAL IO ERROR: 
keyword global is undefined in dictionary "/beam2/fluid/0/pointDisplacement::boundaryField"

The patch global of course it's not created during the meshing process.
I think that the problem is somehow in the cyclic condition in the fail pointMotionU.
Someone of you has some experience about this kind of problems ?

Thank you in advance

Nigò · January 24, 2017, 12:10

Actually I have managed to correct the error about the global patch (it was a different way to define cyclic patch in foamextended that of).

But after the first iteration the solver blow-up because the patch in the direction of fluid are not constrained (i guees) because in the pointMotionU I have to set the bc as cyclic.

So anyone have a motion solver that will do the job ?

January 24, 2017, 10:59	problem with cyclic condition and FSI	#1
Nigò New Member Join Date: Oct 2013 Posts: 12 Rep Power: 13	Hello Foamers, I'm trying to symulate a vertical beam a cross flow, where the flow is driven by a volume force and the boundary condition in the fluid domain are cyclic. I've started from the beamInCrossFlow tutorials in the FSI package fro the foamextended 4 and I succesfully added the source term for the fluid equtions, but I have problems whith the cyclic conditions. After setting the inlet-outlet cycling bc, when I lunch the fsiFoam solver I get this error: """ Code: Create time Create dynamic mesh for time = 0 Selecting dynamicFvMesh dynamicMotionSolverFvMesh Selecting motion solver: displacementLaplacian --> FOAM FATAL IO ERROR: keyword global is undefined in dictionary "/beam2/fluid/0/pointDisplacement::boundaryField" The patch global of course it's not created during the meshing process. I think that the problem is somehow in the cyclic condition in the fail pointMotionU. Someone of you has some experience about this kind of problems ? Thank you in advance

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January 24, 2017, 12:10		#2
Nigò New Member Join Date: Oct 2013 Posts: 12 Rep Power: 13	Actually I have managed to correct the error about the global patch (it was a different way to define cyclic patch in foamextended that of). But after the first iteration the solver blow-up because the patch in the direction of fluid are not constrained (i guees) because in the pointMotionU I have to set the bc as cyclic. So anyone have a motion solver that will do the job ?