For that reason, CHEMKIN is often used in conjunction with Computational Fluid Dynamics tools that are better able to account for geometric complexity, at the expense of being more limited in their treatment of the underlying chemistry of the reactive process being studied.
For that reason, a related program called KINetics is often used in conjunction with Computational Fluid Dynamics tools. CFD programs are better able to account for geometric complexity, at the expense of being more limited in their treatment of the underlying chemistry of the reactive process being studied.