Adding Hydrogen

Cristiano · September 3, 2010, 05:20

Hi all,

I am beginning to use FireFoam Solver for modelling a Jet in Hot Coflow fuelled with a mixture which is made up of methane and hydrogen.
I have successfully run my first methane -air case

.
I am thinking to add hydrogen since I have hot a lot of papers which includ a lot of experimental results for methane/hydrogen mixture.
What can I do to add hydrogen in the mixture (I have never written in C++

)? Which files should I set properly to do that?

I think of modelling this flame by two different combustion models (EDC and Mixture Fraction).

Thank you in advance for your time.

Cristiano

MaximeIST · September 6, 2010, 10:41

Hello everybody

Sorry Cristiano, I am also a beginner with firefoam and I cannot help you in this question, at least for now. I am still learning to use openFoam, and especially fireFoam. I reply because I am interested in what you did with the methane-air flame.

Did you succeed in running a methane-air diffusion jet flame,
such as Sandia flame?
Because that's what I am trying to do, but without success for now. I tried a lot of different conditions and solvers but never succeed.
What are the boundary conditions you choose for the velocity, pressure, and for b, ft and fu ?
(if I am right, b is the normalized fuel mass fraction, ft is the total and fu is the unburnt fuel mass fraction in the veryInhomogeneousMixture thermophysical model) ?
Can you tell us more about this succeeded methane-air case?

thanks a lot,
Maxime

September 3, 2010, 05:20	Adding Hydrogen	#1
Cristiano New Member Cristiano Join Date: Jun 2010 Posts: 14 Rep Power: 16	Hi all, I am beginning to use FireFoam Solver for modelling a Jet in Hot Coflow fuelled with a mixture which is made up of methane and hydrogen. I have successfully run my first methane -air case . I am thinking to add hydrogen since I have hot a lot of papers which includ a lot of experimental results for methane/hydrogen mixture. What can I do to add hydrogen in the mixture (I have never written in C++ )? Which files should I set properly to do that? I think of modelling this flame by two different combustion models (EDC and Mixture Fraction). Thank you in advance for your time. Cristiano Last edited by Cristiano; September 3, 2010 at 06:28.

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September 6, 2010, 10:41		#2
MaximeIST New Member Join Date: Feb 2010 Posts: 8 Rep Power: 16	Hello everybody Sorry Cristiano, I am also a beginner with firefoam and I cannot help you in this question, at least for now. I am still learning to use openFoam, and especially fireFoam. I reply because I am interested in what you did with the methane-air flame. Did you succeed in running a methane-air diffusion jet flame, such as Sandia flame? Because that's what I am trying to do, but without success for now. I tried a lot of different conditions and solvers but never succeed. What are the boundary conditions you choose for the velocity, pressure, and for b, ft and fu ? (if I am right, b is the normalized fuel mass fraction, ft is the total and fu is the unburnt fuel mass fraction in the veryInhomogeneousMixture thermophysical model) ? Can you tell us more about this succeeded methane-air case? thanks a lot, Maxime