{"id":162107,"date":"2021-09-09T23:31:23","date_gmt":"2021-09-09T23:31:23","guid":{"rendered":"\/forum\/forums\/topic\/boundary-hfss\/"},"modified":"2021-09-13T12:15:55","modified_gmt":"2021-09-13T12:15:55","slug":"boundary-hfss","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/boundary-hfss\/","title":{"rendered":"Boundary – HFSS"},"content":{"rendered":"
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From my understanding, you can assign boundary from the project manger window. By doing so, the default dimension of the radiating box often equals ~ lamdba\/4 – a recommended distance away from the radiating structure. Also depending on types of boundary (radiation, PML, or FE-BI), this distance can be slightly decreased. However, in some tutorial videos, I see that ones can create a box that encloses the geometry and assign that box as boundary. In this case, the dimension of the boundary is determined by users. <\/p>\n

I want to study electric field across the geometry when applying 42V on a copper plate at 200kHz using HFSS. My study doesn't involve antennas. I'm not sure what to assign for the boundary and how big it should be. Previously, I used Discovery Aim – Electromagnetic. I guess the "boundary" in AIM version is "enclosure" that I can create in Geometry – SpaceClaim. <\/p>\n

In summary, my questions are: <\/p>\n

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  1. Does the boundary have to cover the entire geometry? <\/li>\n
  2. Is it important that the boundary has to be ~lambda\/4? <\/li>\n
  3. Would the boundary that is significantly smaller than lambda\/4 result in inaccurate simulations? My model is 3cm. If I select the default distance, the boundary would be 375m. It is too big compared to the size of my model. <\/li>\n
  4. When in doubt, which type of boundary should I select to get started? <\/li>\n<\/ol>\n

    Hope this all makes sense. Thank you. <\/p>\n

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