[macRC]

Hi everybody and a happy new year,


I'd like to ask whether it's possible to also perform optical simulations with Star-CCM+?


I ask this, because they introduced the so called Surface Photon Monte Carlo Model (SPMC).

According to the term, it should be possible, since Siemens is talking about "Photons". On the other hand, if I read through the theory, I can find this topic in the chapter "heat transfer/ thermal radiation" and obviously it's somehow based on the Stefan Boltzmann theory.


I'm not sure, if the SPMC model is intended for thermal or optical simulations.


My wish is, to perform a thermal simulation (CHT) that also takes optical losses into account for instance.



What are your experiences?


Thanks a lot in advance for your responses.


kr Dominik

[ping]

i have not used the newish PMC radiation model but it certainly can do refraction and thermal too, as can DOM.
but the more common S2S model can do most things for many situations and is only really missing refraction and participating media losses (eg dust).
see the radiation tutorials for good S2S examples.
read about PMC here: https://blogs.sw.siemens.com/simcent...nd-refraction/

[macRC]

Hi Ping and thanks for your response,


Using S2S models in combination of CHT (for LED luminaires for instance) we also reach quite accurate results, from a thermal point of view.



In such thermal simulations it's getting more and more important to also consider the light produced by the LEDs. This means, especially light refraction and absorption!
This would end up in a thermal-optical simulation.



I have read the very interesting article in your link. For me it's not clear, whether this SPMC solver is dedicated for a thermal or optical simulation - or both of it.

In the 2nd paragraph they write about light, whereas in the 3rd it`s the thermal energy (see picture attached).



I still have a lot to figure out about SPMC.
My wish it to treat a LED as both a heat and light source.


Have a nice day

[ping]

without having access to the user manual for v2019.3 or later versions i cant check but from what i read in the release notes PMC is just another very good addition to the thermal radiation models and like the others can be used in all heat transfer applications involving radiation, conduction and convection