GRI 2.1

February 14, 2009, 11:07

Does anybody have any experince in importing gri2.1-arm19?

Could somebody let me know how do import such mechanism file.

AA

February 14, 2009, 12:19

File=>Import=>ChemKIN Mechanism

good luck.

February 15, 2009, 07:39

This mechanism will not work as usual. Since in this reaction mechanism there is no reaction sets available in it. The reactions are hard coded in Fluent.

February 19, 2009, 05:02

There are 2 mechanisms built into Fluent 6, both CARM reductions of GRI-Mech 2.1. One has 19 species and is very good (ie validated over a very large set of problems and range of conditions. The other is a 9 species, and is less general, but also less expensive. To use these, you need to use File -> Import -> CHEMKIN Mechanism in the gui, and use the following inputs.

19 species mechanism Material Name: gri2.1-arm19 Mechanism Name: ARM19.che Thermo File Name: therm-arm19.dat

9 species mechanism Material Name: gri2.1-arm9 Mechanism Name: ARM9.che Thermo File Name: therm.dat

The important thing here is that Fluent identifies the mechanism by the Material Name, so you have to use these. Note that no reactions will show up in the Materials gui.

Once you have imported your mechanism you can enable species and reactions, then BCs etc. etc.

----------------------- arm19.che --------------------- ELEMENTS O H C N END SPECIES H2 H O2 OH H2O HO2 H2O2 CH3 CH4 CO CO2 CH2O C2H2 C2H4 C2H6 NH3 NO HCN N2 END REACTIONS END

----------------------- arm9.che --------------------- !http://www.et.byu.edu:8080/~tom/Pape...WSS96/WSS.html ELEMENTS O H C N END SPECIES H2 O2 OH H2O CH4 CO CO2 NO N2 END REACTIONS !3H2 + O2 + CO2 = 3H2O + CO !H2 + 2OH = 2H2O !3H2 + CO = H2O + CH4 !H2 + CO2 = H2O + CO !3H2 + CO2 + 2NO = 3H2O + CO + N2 END

February 14, 2009, 11:07	GRI 2.1	#1
AA Guest Posts: n/a	Does anybody have any experince in importing gri2.1-arm19? Could somebody let me know how do import such mechanism file. AA

February 14, 2009, 12:19	Re: GRI 2.1	#2
Koen Guest Posts: n/a	File=>Import=>ChemKIN Mechanism good luck.

February 15, 2009, 07:39	Re: GRI 2.1	#3
AA Guest Posts: n/a	This mechanism will not work as usual. Since in this reaction mechanism there is no reaction sets available in it. The reactions are hard coded in Fluent.

February 19, 2009, 05:02	Re: GRI 2.1	#4
cg Guest Posts: n/a	There are 2 mechanisms built into Fluent 6, both CARM reductions of GRI-Mech 2.1. One has 19 species and is very good (ie validated over a very large set of problems and range of conditions. The other is a 9 species, and is less general, but also less expensive. To use these, you need to use File -> Import -> CHEMKIN Mechanism in the gui, and use the following inputs. 19 species mechanism Material Name: gri2.1-arm19 Mechanism Name: ARM19.che Thermo File Name: therm-arm19.dat 9 species mechanism Material Name: gri2.1-arm9 Mechanism Name: ARM9.che Thermo File Name: therm.dat The important thing here is that Fluent identifies the mechanism by the Material Name, so you have to use these. Note that no reactions will show up in the Materials gui. Once you have imported your mechanism you can enable species and reactions, then BCs etc. etc. ----------------------- arm19.che --------------------- ELEMENTS O H C N END SPECIES H2 H O2 OH H2O HO2 H2O2 CH3 CH4 CO CO2 CH2O C2H2 C2H4 C2H6 NH3 NO HCN N2 END REACTIONS END ----------------------- arm9.che --------------------- !http://www.et.byu.edu:8080/~tom/Pape...WSS96/WSS.html ELEMENTS O H C N END SPECIES H2 O2 OH H2O CH4 CO CO2 NO N2 END REACTIONS !3H2 + O2 + CO2 = 3H2O + CO !H2 + 2OH = 2H2O !3H2 + CO = H2O + CH4 !H2 + CO2 = H2O + CO !3H2 + CO2 + 2NO = 3H2O + CO + N2 END