Burning Particle (DPM)

sega · February 10, 2010, 08:05

Hello World.

I'm working with a combustible particle in the Discrete Phase Model.
I have switched on Species Transport Model and Surface Reaction for the Coal Particle (which I have initialized with the Coal Caluclator).

When I am post processing the particle I see that the particle law reaches no. 5, corresponding to the surface combustion. This is exactly as planned, BUT the law is never finised - so I suppose the particle is either burning very long, or not burning at all (because the char fraction is not changing after reaching the surface combustion law).

Any ideas whats wrong?

S.

maxim135 · July 31, 2010, 02:42

I faced the same issue as well. Does someone know how to fix this problem?

sega · July 31, 2010, 05:08

Quote:

Originally Posted by maxim135

I faced the same issue as well. Does someone know how to fix this problem?

I was so blind when I had this problem.
I forgot to initialize the oxygen species in the flow field.
So, without oxygen there was no combustion ;-)

February 10, 2010, 08:05	Burning Particle (DPM)	#1
sega Senior Member Sebastian Gatzka Join Date: Mar 2009 Location: Frankfurt, Germany Posts: 729 Rep Power: 20	Hello World. I'm working with a combustible particle in the Discrete Phase Model. I have switched on Species Transport Model and Surface Reaction for the Coal Particle (which I have initialized with the Coal Caluclator). When I am post processing the particle I see that the particle law reaches no. 5, corresponding to the surface combustion. This is exactly as planned, BUT the law is never finised - so I suppose the particle is either burning very long, or not burning at all (because the char fraction is not changing after reaching the surface combustion law). Any ideas whats wrong? S. __________________ Schrödingers wife: "What did you do to the cat? It's half dead!"

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July 31, 2010, 02:42		#2
maxim135 New Member M Join Date: Jul 2010 Posts: 1 Rep Power: 0	I faced the same issue as well. Does someone know how to fix this problem?