dymanic mesh does not work!!!
 

hello,

i have strugle with dynamic mesh problem.

i need to analyze the oscillating plate in a speaker.

To do this, I used dynamic mesh with 'DEFINE_GRID_MOTION' udf.

The motion works well, but mesh problem occurs.

Although layering (split factor = 0.4, collapse factor = 0.2) option was activated the mesh did not created or destroied, just stretching.

how can i solve this situation?

i captured my problem and attatched it.

my dynamic mesh zone setting follows

1. air : rigid body (zero velocity CG motion) <- i doubt this setting
2. right boudnary(oscillating) : udf('DEFINE_GRID_MOTION' )

please, allow to know me.

thank you

Hi

Can you specify the face significance - how does it behave and move.
First of all create block mesh to use layering option.

If the motion is like piston-cylinder then specify top and/or bottom face as deform. Also specify UDF to right face. This should work. No need to define any condition for air domain.

Best wishes
Mvee

hi mate
recheck the dimensions.
for example if cell dimension near moving wall is 1cm*1cm, you should adjust "Cell Height" value in meshing options to 1cm.