[niyas]

Hello everyone,

I apologize for the lengthy inquiry.

I'm currently engaged in the process of validating the combustion mechanism for ethylene/air. Specifically, I'm utilizing three different mechanisms: Mawid.cti, QGMech.cti, and USCMech.cti.

Mawid.cti and QGMech.cti were generated based on the reference papers (Mawid,1997 and Jachimowski,1994), while USCMech.cti was sourced from the following web link

https://ignis.usc.edu:80/Mechanisms/USC-Mech%20II/USC_Mech%20II.htm

All the mechanism files are attached here.

For my analysis, I've employed Cantera 2.6.0 in conjunction with a Jupyter Notebook script (also attached) to generate flame speed results, as depicted in Figure 1 (attached).

My concern lies in the observation that the flame speed results exhibit significant disparities. I kindly request assistance from the community to provide insights into the reasons behind this discrepancy.

Thank you in advance