Analyzing Fuel Characteristics in a micro channel

geeteshwaghela1234 · March 9, 2015, 00:53

I have been simulating a micro channel with methane-air as fresh mixture with various reaction mechanisms. I am using 2D axissymettric model. I am not able to get a stable combustion and mass fractions observed at outlet are pretty low telling that combustion is not proper. i am doing steady analysis. the flame front appears to move towards inlet. my inlet velocities are ranging from 0.1 to 1 m/s.
i have experimental temperature of the outer wall which i imposed by creating a profile file on the outer wall.
Can anybody help?

sjbub · March 12, 2015, 12:01

Are you sure you're getting a flame started?

geeteshwaghela1234 · March 12, 2015, 21:47

well for lower velocities untill 0.5 m/s, the mass fraction of ch4 is completely consumed where the temerature is high on the outer wall. so yes combustion is occuring. but when i increase the complexity like i increase number of reactions and species, the mass fraction doesn't consume at all.

March 9, 2015, 00:53	Analyzing Fuel Characteristics in a micro channel	#1
geeteshwaghela1234 New Member Geetesh Waghela Join Date: Apr 2014 Posts: 6 Rep Power: 12	I have been simulating a micro channel with methane-air as fresh mixture with various reaction mechanisms. I am using 2D axissymettric model. I am not able to get a stable combustion and mass fractions observed at outlet are pretty low telling that combustion is not proper. i am doing steady analysis. the flame front appears to move towards inlet. my inlet velocities are ranging from 0.1 to 1 m/s. i have experimental temperature of the outer wall which i imposed by creating a profile file on the outer wall. Can anybody help?

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March 12, 2015, 12:01		#2
sjbub New Member anonymous Join Date: Mar 2015 Posts: 25 Rep Power: 11	Are you sure you're getting a flame started?

March 12, 2015, 21:47		#3
geeteshwaghela1234 New Member Geetesh Waghela Join Date: Apr 2014 Posts: 6 Rep Power: 12	well for lower velocities untill 0.5 m/s, the mass fraction of ch4 is completely consumed where the temerature is high on the outer wall. so yes combustion is occuring. but when i increase the complexity like i increase number of reactions and species, the mass fraction doesn't consume at all.