Learning Forum

[mariannebassil]

Hello! I have a sliding interface between two walls. So Fluent generates a wall boundary for each interface. Now, i want to apply a dynamic mesh for one of the two walls ( membrane deformation using a uDF grid motion). I was thinking to apply the wall as a deforming zone but i was surprised that the motion didn't work unless i define the interface as a deforming zone not the wall! and this is caused me problems in the motion because it caused the displacement of the other wall without even defining it as a deforming zone! Is it logic!

[Keyur Kanade]

can you please insert some zoomed in images of your mesh, interfaces, set up. 

do you want only one wall to move? give more details about your dynamic mesh set up. 

[mariannebassil]

I have a cavity moving in x direction on a road. The interface is between the road and the cavity. I considered the movement in x direction by putting V=10 m/s in the cell zone conditions of the cavity (fluid: air) . Now, for the movement of the top wall of the cavity, i considered the top wall of cavity as a dynamic mesh zone but the displacement failed. I considered the interface top of the cavity as a dynamic zone, i got a displacement for the top but also for the road!

[mariannebassil]

 

i attached the example of mesh. i got a displacement of the top but when assigning the two interfaces not the walls as deforming zone

 

[mariannebassil]

road=chaussee in above image

[mariannebassil]

for the grid motion, i have a table of points assigning at each time step, a displacement for each node of the top wall (does fluent also divide the interface into nodes like for the wall? because i am afraid that the nodes aren't well read by the udf if the deforming zone is an interface not a wall)

[Rob]

Please can you add the images in with the text (there's an insert image button in the editing bit as you add text). Staff are not allowed to open attachments. 

[mariannebassil]