Stiff Chemistry Solver
 

Hi

Does anyone have any idea about the Stiff Chemistry Solver in Fluent? When I do Finite Rate Kinetics I have to use very low time steps. Does the Stiff Chemistry solver help me increase the timesteps?

Thank you in advance.

Arun

Re: Stiff Chemistry Solver
 

Fluent 6.1 has a stiff chemistry solver for the coupled implicit solver. Fluent 6.2 has a stiff chemistry solver for the segregated solver. This uses ISAT and would certainly be the preferred approach for low speed flows.

Re: Stiff Chemistry Solver
 

Thanks for the information. Does preferred mean that it is not possible to do High speed flows (Mach >2)?