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

May 2, 2024 at 8:37 am
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)