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October 19, 2015, 05:38 |
2 reactions
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#1 |
New Member
Join Date: Apr 2015
Posts: 3
Rep Power: 11 |
Hello,
I want to run two parallel reactions in OpenFoam and I use Arrhenius for both equations. Both reactions work seperately but they don't seem to influence one another as they should. Even the change in temperature doesn't seem to make a difference. Does anyone have an idea why it doesn't work properly? Is Arrhenius not the right attempt? Thanks, sbo |
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February 7, 2021, 12:47 |
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#2 | |
Senior Member
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Hello sbo,
Do you got the solution for your question ? In my work, I'm facing the same issues now. In my case, Quote:
(i) only EQU. (1) (ii) both EQUs. (1) and (2) (iii) implementing EQU. (2) firstly followed by EQU. (1) [exchanging EQUs. thinking that only first EQU. being solved] In (i) (ii) (iii), results are same. When I solve only EQU. (2), results are different. So what I feel is, may be the influence of EQU. (1) dominates the other EQU. (2). But, still something fishy. Why there is not even a minor influence of EQU. (2) in the solution, although EQU. (1) dominates. |
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February 7, 2021, 23:32 |
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#4 | |
Senior Member
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Hello Mr. Domenico Lahaye,
Thank you for your comment. If I'm not wrong, in OpenFOAM chemkin is implemented only for gaseous reactions. In my case, its solid (coal) involved as a reactant. Quote:
Kindly share your thoughts. Thank you |
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February 8, 2021, 04:14 |
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#5 |
Senior Member
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In my limited understanding, I distinguish two subproblems.
The first is defining the reaction mechanism. This is independent of gaseous or coal combustion. The second is to perform combustion simulations using the reaction mechanism as input. Here indeed an appropriate solver is indeed required. Hope this helps a bit. Cheers, Domenico. |
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February 8, 2021, 11:17 |
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#6 | |
Senior Member
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Hello Mr. Domenico Lahaye,
Thank you for your thoughts. Quote:
https://openfoamwiki.net/index.php/ChemFoam I guess it should be the one, which I'm looking forward - where I found such settings in OF version 2.4.0 and higher versions. Currently, I'm using OF 2.1.1, the reason why I couldn't able to find such possibility before. Let me try this and find the difference in results. However when comparing OF versions 2.1.1 and 2.4.0, I couldn't able to find much differences in the code, concerning the above multiple reactions.. Any thoughts to share ? Thank you again |
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Tags |
arrhenius, hydrogen, methane, parallel computing, reactions |
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