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Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › LS Dyna CESE solver › Reply To: LS Dyna CESE solver

January 24, 2024 at 2:32 pm
Reno Genest
Ansys Employee

Hello Atish,

Yes, the default units for activation energy is cal/mol and I would say mol-cm-s-K is correct fo preexponential factor. Here is more information from the developer:

"The chemkin data units are restricted as described next:

  1. CGS is required
  2. The rate constants are expressed in cm^3/mol.s for bimolecular reactions and in s^(-1) for unimolecular reactions.
  3. The energy unit is erg for internal energies, enthalpies, entropies, free energies, and heat capacities.
  4. For activation energies, the default unit is cal/mol;  however, the user can choose another unit for the activation energies by including a supplementary key word as JOULE/MOLE after the key work REACTION to switch to use J/mol as the unit for activation energies."

 

Reno.