Hi All, I am rookie for Computational Combustion. I would like to know what is CHEMKIM, How it is interfaced with CFD?

What are all the details CFD solver would get from CHEMKIN? What are all the inputs to CHEMKIN from CFD solver? How do we control, Number of sub-reactions to be solved?

Thanks Venkatesh V

CHEMKIN is the code used by FLuent for computation of combustion. Use FLuent if you want to study combustion. My email address is wwlxx39849@yahoo.com.

It's also used by STAR-CD and Wave (http://www.reactiondesign.com/produc...cs_module.html). CHEMKIN is an independent tool developed by Reaction Design for solving complex chemistry. Similar to DARS. Basically, the CFD code solves the flow (i.e. temp/press/mixing etc) and you couple it to CHEMKIN to solve the combustion part and feeds back to the CFD code. You run the two programs together.

Dear Donald and Tim, Thanks for your reply.

Does that mean, Fluent and StarCD would not solve the equation for species transport?

Is CHEMKIN is used by Fluent and StarCD for all the combustion models(for both pre-mixed and diffusion)?

Venkatesh V

Hi Venkatesh,

STAR-CD/Fluent will solve for the species transport, the question is, who does the reaction bit. Both STAR and Fluent have their own combustion/reaction models for pre-mixed/diffusion combustion (PPDF, Eddy break-up, G-equation, CFM, ECFM, ignition) that can be run on their own. Alternatively, you can run the coupled simulation, where they use CHEMKIN to solve the reaction. I guess the advantage is the CHEMKIN will do a more detailed job, it's better at dealing with complex reactions with many hundreds/thousands of species and steps. I'm more familiar with DARS than CHEMKIN, so am not totally sure what CHEMKIN can do, but certainly with DARS you can do reduction of reactions (work out which steps are required and which can be ignored), and has things like flamelet libraries and solution mapping (coupling with DOLFA) to speed up solution times. I guess CHEMKIN does similar?