Problem description

Several examples use GRI3.0 despite only using H2 as fuel (e.g. Python custom.py and the proposed C++ custom example). As discussed in #922, h2o2.yaml would be a more appropriate choice under those circumstances. While run time and storage size may not be a major concern, I believe it sends the wrong message (always automatically default to gri30.yaml, despite this having been long superseded by better choices). Forcing users to replace the mechanism file is an opportunity to make them stop and think about alternatives (which may help clarify that GRI3.0 mainly serves illustration purposes).

The ‘fix’ is obviously not difficult.

PS: As a minor ‘complication’, N2 could be added as an alternative diluent to h2o2.yaml (I am not advocating for inclusion of any nitrogen reactions).

System information

• Cantera version: 2.5.0b1
• OS: all
• Python/MATLAB/other software versions: all