Learning Forum

[lhend22]

I'm interested in modelling plasma reactor systems in chemkin-pro, but am relatively new to the software and am encountering a few pretty persistent errors. Specifically, my simulations fail whenever I try to use plasma reactor models in series with gas mixers, as shown in the attached image.

Every time I do this, I find the following errors in the gas mixer outlet file:

""Initializing inlet C1__Plasma_PSR_to_C2__Gas_Mixer from solution file

 C:Users...
 ERROR..."ENGE" OR "TEGV" MUST BE SPECIFIED WITH ELECTRONS
 ERROR...NEED TO SPECIFY "XSEK" FOR ALL SPECIES OR "XSDF"
  WARNING..."ETMP" NOT SPECIFIED; USING TE=T
  PSR FATAL ERROR: ERROR IN INPUT FILE  - STOPPING

 ERROR: INPUT OR PROBLEM SETUP ERRORS MUST BE CORRECTED BEFORE PROCEEDING"

If anyone has any knowledge that might be of some assistance here, it would be greatly appreciated.

[Rob]

I'm not familiar with the Chemkin side of things, but the error suggests there are some settings missing: can you go back and check you've added values everywhere? 

[lhend22]

It doesn't seem like I've missed any essential values... At least, in the standard interface. I've attached screenshots of those (I also have filled in the mole fractions for all relevant units). According to the manual "ENGE" as a keyword solves the electron energy equation, in the same way "ENRG" does for the energy equation. I think in order to resolve this, I may need to go digging in subroutines, which I am definitely not prepared to do.

However, it seems I can temporarily bypass this problem by using a Plasma PSR unit instead of a mixing unit and specify an extremely short residence time. This seems to achieve a similar effect.

[Rob]

Excellent. On our side we're increasing the presence of ANSYS staff whilst the community gets going but currently don't have good coverage on the smaller products or some of the more specialist areas in the more common solvers.