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Source term for EVAPORATION in Energy Equ. - technical difficulty ? |
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September 8, 2019, 04:43 |
Source term for EVAPORATION in Energy Equ. - technical difficulty ?
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#1 | |||
Senior Member
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Hello Foamers,
My problem is a kind of 1D pyrolysis (Wet Coal) modelling, which is focussed mainly on heat loss - thus only Energy (heat) equation is included in my work. Quote:
SOURCE TERM 1 (Pyrolysis) = heat loss due to pyrolysis solved by Arrhenius-like degradation chemistry (SOLVED this source term based on FireFOAM 1D pyrolysis model code- NO ISSUES HERE) SOURCE TERM 2 (Evaporation) = phase change - moisture to vapor (moisture embedded in the wet coal). Quote:
REF - Clear details here in this MANUSCRIPT ~ https://sci-hub.tw/https://doi.org/1...361(83)90225-9 (ATKINSON, B., & MERRICK, D. (1983). Mathematical models of the thermal decomposition of coal4. Heat transfer and temperature profiles in a coke-oven charge. Fuel, 62(5), 553–561) How the source terms can be included in such problems? I have contacted certain people, few replied as they are not familier with pyrolysis, others asked me to look into interFoam solvers. But the approach of interFoam seems to different with separate transport equation for volume fraction, which is not the same in my case. I'm trying to figure out and learn as how the problem can be attacked based on algorithm and importantly how such problems can be approached step by step in OpenFOAM// Quote:
Please share your ideas, it will be highly helpful. Thank you. |
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September 9, 2019, 10:32 |
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#2 | ||
Senior Member
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Hello Foamers,
As explained above, I've been trying to setup the SOURCE TERM 2 for the pyrolysis solver. I have two ideas to discuss here: (not sure which will go really well for my case) 1) Coupling SOURCE TERM 2 inside the pyrolysis solver under "reactingOneDimCoeffs". Doing this, I guess both pyrolysis and moisture evaporation will occur simultaneously. Quote:
But in pyrolysis solver, "solidificationMeltingSource" can be a good choice? If I introduce fvOption, I have to edit my main source code pertaining to solidificaionMeltingSource to get it to work right ? Quote:
Any ideas about above methods? Kindly give some suggestions. Thank you Last edited by Kummi; September 9, 2019 at 10:37. Reason: Inclusion of SOURCE TERM |
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