Ansys Learning Forum Forums Discuss Simulation Fluids Question on the pre-exponential factor Reply To: Question on the pre-exponential factor

Vijay Narayan
Ansys Employee

Hi Wang,

The unit of Pre- exponential factor depend on the order of reaction (there is no single/universal unit). If the above reaction database is based CHEMKIN format. then the units would cgs form.

For example a first order reaction which no temperature exponent, would have a unit of s-1.

Below is the snippet from CHEMKIN Input Manual (for your reference)