Stiff Chemistry Solver

June 17, 2004, 14:31

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

June 17, 2004, 18:05

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.

June 17, 2004, 20:45

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

June 17, 2004, 14:31	Stiff Chemistry Solver	#1
Arun Guest Posts: n/a	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

June 17, 2004, 18:05	Re: Stiff Chemistry Solver	#2
cg Guest Posts: n/a	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.

June 17, 2004, 20:45	Re: Stiff Chemistry Solver	#3
Arun Guest Posts: n/a	Thanks for the information. Does preferred mean that it is not possible to do High speed flows (Mach >2)?

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