get unlogic profil of reactant and product concentration in combustion reaction

nay robin · June 26, 2013, 02:01

Hi everyone,

Im tryin to simulate combustion in combustion chamber. the fuel is gas pyrolysis (ch4, c2h6, h2, and co) it enter the domain from the bottom of the chamber. i also have air input which comes into chamber from holes at the side of chamber.

i use 3 interfaces :
-heat transfer in fluid
-turbulent k-e
-transport in diluted species

the problem is, concentration result seems so unlogic because there are some spot where the reactant increase and also only a little spot the product exist. and the product is decrease.

hopefully anyopne could help me to get out from this problem.

thank you

michujo · June 26, 2013, 05:57

Hi. Could you please post some pictures of your case so that people here can understand better your problem? For example velocity field, species (reactants and products) concentration field, temperature and heat release?

Cheers,
Michujo.

June 26, 2013, 02:01	get unlogic profil of reactant and product concentration in combustion reaction	#1
nay robin New Member nay robin Join Date: Jun 2013 Posts: 1 Rep Power: 0	Hi everyone, Im tryin to simulate combustion in combustion chamber. the fuel is gas pyrolysis (ch4, c2h6, h2, and co) it enter the domain from the bottom of the chamber. i also have air input which comes into chamber from holes at the side of chamber. i use 3 interfaces : -heat transfer in fluid -turbulent k-e -transport in diluted species the problem is, concentration result seems so unlogic because there are some spot where the reactant increase and also only a little spot the product exist. and the product is decrease. hopefully anyopne could help me to get out from this problem. thank you

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June 26, 2013, 05:57		#2
michujo Senior Member Join Date: Dec 2011 Location: Madrid, Spain Posts: 134 Rep Power: 15	Hi. Could you please post some pictures of your case so that people here can understand better your problem? For example velocity field, species (reactants and products) concentration field, temperature and heat release? Cheers, Michujo.