Hi Carsten, I'm not quite sure I understand the problem from your description, could you add a little more to the problem ?

Regards

Allan.

Hi,

the problem is the different movement of interfaces as depicted. The image shows the 2 sides of the solid-fluid-interface and thus should behave in the same manner. If the interfaces move differently, the streamlines pass through the solid which casts doubts on the simulation.

The interface settings are listed below

FLOW: Flow Analysis 1

DOMAIN: Valve

&replace BOUNDARY: Fluid_Solid Side 2

Boundary Type = INTERFACE

Interface Boundary = On

Location = INTF_Solid_Fluid

BOUNDARY CONDITIONS:

HEAT TRANSFER:

Option = Conservative Interface Flux

END

MESH MOTION:

Option = Specified Displacement

DISPLACEMENT:

Displacement X Component = 0 [m]

Displacement Y Component = ynew

Displacement Z Component = 0 [m]

Option = Cartesian Components

END

END

END

NONOVERLAP CONDITIONS:

Boundary Type = WALL

BOUNDARY CONDITIONS:

HEAT TRANSFER:

Option = Adiabatic

END

MESH MOTION:

Option = Specified Displacement

DISPLACEMENT:

Displacement X Component = 0 [m]

Displacement Y Component = ynew

Displacement Z Component = 0 [m]

Option = Cartesian Components

END

END

END

END

END

END

END

What can I add for a better understanding?

Thanks in advance

Hi.

First of all...

Is that all your domain? I mean the meshes which are on the picture are all you got? if so, the fluid mesh is very wrong. even if you get the answer. they wont be reliable.

second you must check the boundary condition to see if you forgot any thing to do right.

I think i need to know more to hypothesize more possible problems. let me know if you got something.

Hi,

I only enclosed some parts of the ccl and the picture is out of cfx post with mesh lines partly on, not on the full domain. And the "very wrong" part is the problem I want to solve :)

BC should be fine. I enclosed the ccl for those who might be interessted (names are in german).

I think sir the attached tutorial is very useful for 1-Way-FSI problem. 

I'll take a deeper look into the files you provided. Thanks