Chemistry in PECANS

Idealized mechanisms

ideal_first_order: This mechanism simply assumes that any chemical species are lost at the same first order rate. That is, every species A follows the rate law:

\[\frac{\partial [A]}{\partial t} = -\frac{1}{\tau} [A]\]

\(\tau\) is set in the configuration file using the mechanism_opts option. Specifically, it must include the lifetime_seconds key, e.g.:

mechanism_opts = lifetime_seconds: 10800

will set a 3 hour lifetime for any and all model species.

For the code used to set up these solvers, see Ideal chemical mechanisms