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Methane/Air Combustion
Posted Mar 16, 2017, 4:08 p.m. EDT Fluid & Heat, Heat Transfer & Phase Change, Computational Fluid Dynamics (CFD), Chemical Reaction Engineering Version 5.2a 2 Replies
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Hello all,
I am trying to recreate the OpenFOAM methane air combustion tutorial for reactingFoam and seem to be having some trouble starting the reaction. Any help would be great.
I am trying to recreate the OpenFOAM methane air combustion tutorial for reactingFoam and seem to be having some trouble starting the reaction. Any help would be great.
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2 Replies Last Post Mar 17, 2017, 10:07 a.m. EDT
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Posted:
8 years ago
Hello,
If Ta = Ea/Rg = 14906 K, then Ea = Ta*Rg = 14906 K * 8.314 J/(mol K).
In your model you wrote Ea = 14906. [K] * (8314.5 [J/mol/K]), which is 1000x higher activation energy that in the OpenFoam tutorial.
-DW
If Ta = Ea/Rg = 14906 K, then Ea = Ta*Rg = 14906 K * 8.314 J/(mol K).
In your model you wrote Ea = 14906. [K] * (8314.5 [J/mol/K]), which is 1000x higher activation energy that in the OpenFoam tutorial.
-DW
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Posted:
8 years ago
Thank you for that, fun mistakes when your used to working in kmol. I replaced that as discussed and now run into an all to familiar error where I am having difficulties getting COMSOL to converge when all three physics models are used. I solve for the flow and transport of concentrated species together and then use those as the basis for a new study like the Syngas Combustion tutorial. It always ends with a Temperature T division by zero error. I have adjusted the pseudo time-stepping CFL number in the segregated solver to no avail.
-Robert
-Robert