[amin_u50]

hi....i want to to simulate HCCI engine with AVL FIRE...therefore i need to import chemical kinetic but i don't know how done this work...does anybody know about this problem...help me...thnx

[avlcomb]

First of all, you need an ascii file containing the chemical reactions in Chemkin II compatible layout. Additionally you might also need the files thermdat and trandat, which contain the thermochemical and transport data for the species. Note, that the properties of many species are already contained in FIRE, so you need the external files only in the case that the species are not in the internal database.

Second step is to create a case and choose 'General Gas Phase Reactions' (GGPR). There you can browse the mechanism file.
Chose other options as 'turbulence chemistry interaction' to your convenience. It is not recommended to change the settings for the chemistry solver - keep the default values.
If thermdat or trandat is required for your project, copy the file(s) to the calculation case directory.

[amin_u50]

hi avlcomb... i solve that kinetic problem in AVL FIRE and thanks you for guide me.i found General Gas Phase Reaction in AVL FIRE...thanks a lot...

[santoso_lipi]

Dear all,

I try to incorporate the mechanism file. The solver could read the file, in the .fla file:

%fire-I-CHOM_INIT_CHEMISTRY, Done: Reading Chemical Reaction Input File:
%fire-I-CHOM_INPUT, Finished setup of homogeneous reactions.

And call the solver:

%fire-I-chom_rate, calling solver for homogeneous reactions
%fire-I-chom_rate, progress of ODE solution = 20%
.................................................. .........
%fire-I-chom_rate, progress of ODE solution = 100%

But could not start the calculation. The calculation stop at first time step:

%fire-I-cysetup, ====================================
Testing proper position of injector:
%fire-I-cysetup, Calculation continues

Any body could help to solve the problem?
Thank you

[Karthikeya]

I can help you . But not on line. message me ur mobile no. or e mail id. we wil be in touch with that. where are you from. 9912194512

[ruamojica]

Hi Everyone, I see the problem is discussed in 2013. Currently, I'm working with the AVL Fire R2019 version and I can't find how to introduce the thermdatfile in the simulation, and the simulation doesn't run.




People say in some post related to this issue that I have to set the "external" option into the fluid properties, but in this version, I can't find this option.


Additionally, in the fluid properties, I only can work with air like a fluid, someone knows if this is part of the problem?


Thanks a lot for your help... See you.

[chittipo]

Hi,

If you are using FIRE-C, you should be able to find 3 options for thermodynamic data at Fluid Properties: 1. Internal 2. External and 3. both. When you choose External or both solver expects "thermdat" (there is no period between therm and dat) file in corresponding Case directory.

If you are using FIRE-M, then the story is completely different. Could you anyway contact FIRE-Support?

[ruamojica]

Thanks a lot for your help. My problem was related to the simulation case configuration, it don't allows to show the checkbox for the thermodynamic data.