I am having issues simulating a small structure using the frequency domain solver and tetrahedral mesh. The object is supposed to be a wall of metal spheres arranged in hexagonal closest packing. The wall is meant to be infinite in xy so I have used the unit cell boundary conditions. I am trying to calculate the planewave reflection and transmission through this wall as I add layers in z by using the floquet modes. The default mesh settings were successful until I reached 8 layers and now it is giving me an error when generating the mesh, "Self-intersecting or very close faces are present in the mesh." I have tried:
- Mesh Properties/Maximum Cell/Cells per maximum model box edge/100
- Add small space between the spheres (ideally they touch)
- Curvature Approximation Settings/Normal Tolerance/1
- Curvature Approximation Settings/Curved Element/Fixed/4
- I have tried to simulate the spheres alone, and the spheres with the background media modeled.
The spheres are stainless steel and have a radius of 25 micron. The frequency is Ka Band 26.5 to 40 GHz.
Any help would be greatly appreciated.
CST Studio Suite
