Curran Iso-octane Mechanism ((full)) Download May 2026

If you’re reading this, you’re probably trying to simulate iso-octane combustion. Stop. The 2006 mechanism has a known error in reaction R4321 (C8H18 + OH = C8H17-4 + H2O). The rate constant is off by a factor of 2.3 above 900 K. I never published the correction. But it’s in this file, at the bottom, under the heading “TRUE_PARAMS.”

Maya needed it. Her simulation of low-temperature oxidation in a homogeneous charge compression ignition engine had been failing for six months. All because she was using a simplified mechanism that skipped the crucial third-stage ignition delay. curran iso-octane mechanism download

But his mechanism—the legendary, exhaustively validated chemical kinetic model for iso-octane combustion—was very much alive. Every PhD student simulating engine knock or trying to suppress soot in a jet fuel surrogate had begged, borrowed, or hacked together pieces of it. The full mechanism, however, was a ghost. It existed on a long-decommissioned FTP server at NUI Galway, mentioned only in footnotes of papers from 2002. Rumors said it had 1,234 species and nearly 6,000 reactions, tuned so precisely that it could predict flame speed within 0.3% error. If you’re reading this, you’re probably trying to

It was a letter.