Thermal Dissociation in Star-CCM+

Shah Akib Sarwar · April 19, 2021, 16:36

Could somebody please guide me on how to account for thermal dissociation at high temperatures (~5000 K) in Star-CCM+? The gases in my model are H2, H20 and Air. As I am fairly new to using Star-CCM+, any help in this regard would be much appreciated!

LuckyTran · April 20, 2021, 17:05

You need a kinetic model. Do you have one? Something like a chemkin file.

You need to turn on multicomponent gas and species transport models and detailed chemistry if you want to brute force it.

Shah Akib Sarwar · April 21, 2021, 07:11

I do not have a kinetic model. Actually, I have never used chemkin before.

For brute forcing, did you mean choosing multi-component gas-->reacting-->reacting species transport-->complex chemistry from the physics models? What should I choose for turbulence chemistry interactions (Eddy dissipation or laminar flame)?

April 19, 2021, 16:36	Thermal Dissociation in Star-CCM+	#1
Shah Akib Sarwar Member Shah Akib Sarwar Join Date: Mar 2021 Posts: 41 Rep Power: 5	Could somebody please guide me on how to account for thermal dissociation at high temperatures (~5000 K) in Star-CCM+? The gases in my model are H2, H20 and Air. As I am fairly new to using Star-CCM+, any help in this regard would be much appreciated!

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April 20, 2021, 17:05		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,750 Rep Power: 66	You need a kinetic model. Do you have one? Something like a chemkin file. You need to turn on multicomponent gas and species transport models and detailed chemistry if you want to brute force it.

April 21, 2021, 07:11		#3
Shah Akib Sarwar Member Shah Akib Sarwar Join Date: Mar 2021 Posts: 41 Rep Power: 5	I do not have a kinetic model. Actually, I have never used chemkin before. For brute forcing, did you mean choosing multi-component gas-->reacting-->reacting species transport-->complex chemistry from the physics models? What should I choose for turbulence chemistry interactions (Eddy dissipation or laminar flame)?