skew mesh size problems Answered
Hi Onscale Team,
I have a question about skew mesh size.
I defined two different mesh size 5um and 100um for two different thickness of layer 20um (pzt) and 1000um.(water)
And boundary condition was zmin : absorb / xmin,xmax,ymin,ymax,zmax as a impedance (water),(xmin = -4.5mm, xmax = 4.5mm , ymin = -4.5mm, ymax = 4.5mm, zmax = 1.2mm, zmin = -0.012mm
I calculated aprs at green point.
However, the result was very unstable. I think it's due to different size of mesh in boundary between two layer.
So, I tried put keypoint between two layers gradually. But it also didn't work.
How can I stabilize my result?
Thank you
3 comments
Hi there,
Instability in results is usually caused by meshing or boundary conditions.
Meshing:
Could you try to match the blue mesh to the red mesh as a test and even if possible match the red to the blue.
Boundary conditions:
Are you using any absorbing boundary condtions? Try changing any absr boundaries to impd (impedance - see command ref). Also, if your aprs output point is too close to this boundary it may be causing issues. So you could also try moving the boundary further away.
If none of this works send your files over to us with the results from these tests and we can have a look.
I hope this helps!
Best Regards,
Chloe.
Thank you for quick reply!!
Are you meaning that match the size of blue mesh and red mesh? But as you know thickness of pzt material is 20um and water is 1mm. So if match those mesh together, size of the meah is bigger than pzt material. So It also makes error to load the electrode.
I was suggesting trying both ways if possible. You can set the box size the same for both meshes (20 um minimum so the pzt is meshed). This is just to check if the mesh different is causing the instability.
Best Regards,
Chloe.
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