Bad points

[amina Hlou]

Dear THERM Forum Community,

I hope this message finds you well.

I'm currently working on a thermal simulation using THERM and I'm encountering several "bad points" in my model. I’ve reviewed the geometry and tried to clean up intersections, but the issue persists.

Could anyone please explain:

• What typically causes "bad points" to appear?

• What are the best practices or steps to resolve them?

• Are there any specific tools in THERM that can help identify or fix them more effectively?

Any guidance, examples, or documentation references would be greatly appreciated.
Thank you in advance for your help!

[Zugur Rakhmanov]

Hi Amina,

Could you provide the Therm file?

Kind regards, 

Zugur

Вт, 20 мая 2025 г. в 19:51, amina Hlou <amina...@gmail.com>:

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[Robin Mitchell]

I posted this to another thread with this same question

See section 6.5.3. Voids, Overlaps and Bad Points, page 6-43 in the THERM7/WINDOW7 NFRC Simulation Manual, which explains how THERM determines bad points. 

https://cdn.ymaws.com/nfrccommunity.org/resource/resmgr/simmanual/nfrcsim7-jul2024.pdf

In general they are points that are too close together -- the solution is to simplify the polygon so that there are fewer points and they are not close enough together to trigger this message. 

If you provide the THERM file, I or Zugur (thank you) can explain why the bad points are being flagged. 

Robin

To view this discussion visit https://groups.google.com/d/msgid/LBNL-THERM/CAHkBh391Mepx09baptZQaZKwgVXTtaeb7ZSWgMAUH_smNxpBDQ%40mail.gmail.com.

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Robin Mitchell

Building Technology and Urban Systems Division
Energy Technologies Area
Lawrence Berkeley National Laboratory