DPM coal combustion setting problem

Yezi · July 7, 2015, 16:55

I want to use DPM model to conduct the simulation of coal combustion and now I met two problems.

1) material properties of coal_hv
According to proximate analysis, there are Moisture, Volatile, Fixed Carbon and Ash. I chose "coal_hv" as material under Combusting--Injection--DPM, but I found I could define "Volatile Component Fraction" and "Combustible Fraction" of "coal_hv" under "Materials". So do I need to define the fraction of Moisture and Ash? If so, how can I do?

2) chemical reactions
For the chemical reactions related to coal combustion (e.g. C + O2 = CO2 & C + 0.5O2 = CO & C + CO2 = 2CO & C + H2O = CO + H2), I want to define the reaction rate by my own udf code. But I couldn't find where to define these chemical reactions and then choose the reaction rate.
P.S. I didn't enable Multipahse Model, so I couldn't define reactions through "Reactions--Phases".

Thank you very much.

widi_5 · July 9, 2015, 02:46

are you simulate combustion coal from exhaust stack?

July 7, 2015, 16:55	DPM coal combustion setting problem	#1
Yezi New Member Linwei Join Date: Apr 2015 Posts: 16 Rep Power: 11	I want to use DPM model to conduct the simulation of coal combustion and now I met two problems. 1) material properties of coal_hv According to proximate analysis, there are Moisture, Volatile, Fixed Carbon and Ash. I chose "coal_hv" as material under Combusting--Injection--DPM, but I found I could define "Volatile Component Fraction" and "Combustible Fraction" of "coal_hv" under "Materials". So do I need to define the fraction of Moisture and Ash? If so, how can I do? 2) chemical reactions For the chemical reactions related to coal combustion (e.g. C + O2 = CO2 & C + 0.5O2 = CO & C + CO2 = 2CO & C + H2O = CO + H2), I want to define the reaction rate by my own udf code. But I couldn't find where to define these chemical reactions and then choose the reaction rate. P.S. I didn't enable Multipahse Model, so I couldn't define reactions through "Reactions--Phases". Thank you very much.

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July 9, 2015, 02:46		#2
widi_5 New Member widi Join Date: May 2015 Posts: 10 Rep Power: 11	are you simulate combustion coal from exhaust stack?