I created a new simulation project called 'termic variadors ':
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More of my public projects can be found here.
Hey @ogomis!
Nice model! In order to mesh it easily, try to simplify it as much as possible by removing small details. Also try to merge the solids which will have same material. You can have a look at [this] (Merging solids in Onshape and meshing) forum post for more info.
Hope this helps. If you have any question/s, feel free to ask.
Good luck!
-Ahmed (@ahmedhussain18)