Need to add the mechanism name change to the list_mech file.

Test results look good, thanks for adding these

I always forget the list_mech file. Thanks for catching that. I made the other changes you suggested as well.

These last few commits include a bug fix for 2D spray that was brought up in the LMeX discussions. Previously, the cell volume in two-dimensional simulations for the gas-phase source terms from spray were defined as $V_{cell} = \Delta x \Delta y$. This lead to discrepancies in the gas-phase mass fraction, temperature, and velocity.

The spray model assumes spherically symmetric droplets and is inherently three-dimensional. For two-dimensional simulations, the domain is now treated as one cell wide in the z-direction, with $L_z = \Delta x$, so the volume in the gas-phase source terms is: $V_{cell} = \Delta x \Delta y \Delta x$.

For single droplet cases, this effectively places an infinite array of droplets spaced $\Delta x$ apart in $z$, exaggerating Stefan flow in the x- and y-directions and omitting flow in z. While this has minimal impact on droplet diameter or temperature, it can distort the surrounding gas-phase flow, especially for low $\text{Re}_d$.