Learning Forum

[Pinal]

Is it possible to do a chemical simulation on ANSYS?

[System]

This discussion was created from comments split from: How to add liquidus and solidus temperature for solid?.

[Rob]

Yes. Depending on what you want to know we have several different options, the best being dependent on what you're trying to find out.

[Pinal]

I want to do a thermal decomposition simulation of silicon nitride (SiNx). Can you please suggest me few links from where I can learn about it?.

[Pinal]

[Rob]

Which gives silicon and nitrogen? Are you looking at a surface reaction, packed bed etc? The chemistry solvers are one chapter in the Fluent manual, but you may want multiphase (DPM or Eulerian as a guess) or maybe even a porous media depending on what you are modelling.
Start by sketching out the problem on paper, and what you actually need to know. Then look at how you can get that information from CFD. You'll be surprised how many very complex systems can be simplified once you understand what the driving mechanism is in the physical case.

[Pinal]

Yes, Si3N4 = 3Si +2N2 at 1750 k to 2200 K. I want to heat the SiNx coated Si substrate using a nanosecond laser and capture the thermal decomposition mechanism.

[Rob]

That's not going to be easy, and you'd be supplying the mechanism to the solver to then see rates/temperatures etc. Have a careful read through the documentation to better understand how the models work, and discuss with your supervisor what you want from the results of the CFD models.