autoignition and combustion modelling

parvaz747 · May 27, 2013, 07:39

Hi
I want to model auto-ignition of a gaseous hydrogen jet issue in a hot air co-flow.
which model is better? Composition PDF Transport model or non-premixed combustion?
If i use the PDF model in fluent, the auto-ignition model should be active too ?

sanjeetlimbu · April 24, 2015, 20:18

Dear sir

I am trying to do same autoignition for mixture heptane/N2/O2/AR: 0.562/58/30/10 mole fraction ratio

But unable to do it by any method i tried its not igniting in chemical equilibrium mode, flat temp

I tried use the flamelet - created steady solution by the unsteady is not happening due to error regarding the largest mixture fraction ...
Can u suggest to which model to refer in species

May 27, 2013, 07:39	autoignition and combustion modelling	#1
parvaz747 New Member parviz hash Join Date: May 2012 Posts: 16 Rep Power: 13	Hi I want to model auto-ignition of a gaseous hydrogen jet issue in a hot air co-flow. which model is better? Composition PDF Transport model or non-premixed combustion? If i use the PDF model in fluent, the auto-ignition model should be active too ?

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April 24, 2015, 20:18		#2
sanjeetlimbu Member sanjeet Limbu Join Date: Mar 2015 Posts: 91 Rep Power: 11	Dear sir I am trying to do same autoignition for mixture heptane/N2/O2/AR: 0.562/58/30/10 mole fraction ratio But unable to do it by any method i tried its not igniting in chemical equilibrium mode, flat temp I tried use the flamelet - created steady solution by the unsteady is not happening due to error regarding the largest mixture fraction ... Can u suggest to which model to refer in species