I'm working on vacuum technology for a scientific project and one of the challenges is to optimize the cooling of 2500°C metals in vacuum. I'm wondering if it would be useful to design a grating on the surface of the metal for improved thermal radiation (bigger surface -> better thermal radiation) which would approximately look like this:
Unfortunately I haven't found any papers on this using Google. So the question is if
- this is a viable option for better cooling at all
- how the surface should ideally look like (if the angle is too high, a thermal ray would be just absorbed by the adjacent peak) and if you use a blaze layout (not typically used for radiation ;)) how big the ideal angle should be