Mixing AIR and METHANE

zalho · February 25, 2010, 12:56

Hi.

What is the procedure to simulate the mixing of these two gases without having any reaction??

Is using the Species Model : Species Transport?
Using Multiphase Model?

Help!!!!!

coalgas · February 25, 2010, 19:38

i pretty sure, you dont have to use multiphase model. As both species are in gaseous phase. With 'species transport', you can study diffusion by turning off reactions. But you have to careful about the properties, diffusivity.
Again, consider practicality of the problem, like H2/O2 mixture you can not just mix it as there are chances of deflagration (or may be detonation) with minute addition of energy. in such case you need to turn on 'reactions'

zalho · March 1, 2010, 08:55

Quote:

Originally Posted by coalgas

i pretty sure, you dont have to use multiphase model. As both species are in gaseous phase. With 'species transport', you can study diffusion by turning off reactions. But you have to careful about the properties, diffusivity.
Again, consider practicality of the problem, like H2/O2 mixture you can not just mix it as there are chances of deflagration (or may be detonation) with minute addition of energy. in such case you need to turn on 'reactions'

thanks

i used the species transport and turned off the reactions and i did'it

now i can obtain the contours of the concentration of the gas

ariudin · February 12, 2013, 19:57

when you using this method, are you turn off species equation?or you just turn off volumetric reaction and turn on species equation?
i had similar problem with you, and i'm very appreciated if you answer my question

msaeedsadeghi · February 12, 2013, 23:49

Quote:

Originally Posted by ariudin

when you using this method, are you turn off species equation?or you just turn off volumetric reaction and turn on species equation?
i had similar problem with you, and i'm very appreciated if you answer my question

Yes, there is no need to enable volumetric. By disabling it no reaction takes place, but species can mix together.

ariudin · February 14, 2013, 21:52

thanks for your answer
yes i did disable volumetric, but should i do disable species equation on solution by turn off this option?

February 25, 2010, 12:56	Mixing AIR and METHANE	#1
zalho New Member andre alho Join Date: Nov 2009 Posts: 14 Rep Power: 16	Hi. What is the procedure to simulate the mixing of these two gases without having any reaction?? Is using the Species Model : Species Transport? Using Multiphase Model? Help!!!!!

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February 25, 2010, 19:38		#2
coalgas Member chétan Join Date: May 2009 Location: Australia Posts: 55 Rep Power: 16	i pretty sure, you dont have to use multiphase model. As both species are in gaseous phase. With 'species transport', you can study diffusion by turning off reactions. But you have to careful about the properties, diffusivity. Again, consider practicality of the problem, like H2/O2 mixture you can not just mix it as there are chances of deflagration (or may be detonation) with minute addition of energy. in such case you need to turn on 'reactions'

February 12, 2013, 19:57		#4
ariudin New Member udin Join Date: Oct 2012 Posts: 2 Rep Power: 0	when you using this method, are you turn off species equation?or you just turn off volumetric reaction and turn on species equation? i had similar problem with you, and i'm very appreciated if you answer my question

February 14, 2013, 21:52		#6
ariudin New Member udin Join Date: Oct 2012 Posts: 2 Rep Power: 0	thanks for your answer yes i did disable volumetric, but should i do disable species equation on solution by turn off this option?