Reply To: Pure Ammonia Laminar Flame Speed with FGM Combustion

[Ren]

I've checked 2024R2 and can confirm the following:

1. if I import a set of pregenerated flamelets and then set up the FGM, I do not see the option for LFSC. I think the reason is that, in this scenario, the flamelet-mixture material does not exist and hence Fluent does not have the informaiton to automatically calculated the flame speed.

2. if I duplicate a project where a FGM simulation was already completed without LFSC enabled but with flamelet generated, the LFSC option in the pdf mixture material properties is available. I think this works because the flamelet-mixture material exists.

3. if a FGM simulation was run after generating the flamelets and without enabling LFSC before running the calculation, the LFSC option is still available for the same reason as above.

You might be observing a slightly different behaviour in older releases that no longer exist in the latest release.