[Ask] Methane and temperature distribution in mining

jundika · November 22, 2011, 20:52

Dear All,

I am very new to OpenFOAM. I am trying to simulate temperature and methane distribution in underground coal mine (turbulent flow with heat and species transport no reaction). I have gone through the user manual to see which tutorial is appropriate for it. However, I could not find the appropiate one. reactingFoam, dieselFoam and XiFoam seem suitable but it has reaction while mine is not. Is there any suggestion for newbie like me?

Jundika

marupio · November 23, 2011, 11:09

You could probably capture the methane and temperature transport using scalar transport - combine scalarTransportFoam with a turbulent solver like pimpleFoam. For temperature transport, the "diffusion coefficient" would be your coefficient of conduction through the air. I think there's something you have to do to include the turbulence effects on the scalar transport equation. Not sure about that.

mturcios777 · November 23, 2011, 12:29

With any of the solvers you mentioned (dieselFoam, XiFoam and reactingFoam), you can turn off reactions by switching the option for chemistry off in the constant/chemistryProperties file.

jundika · November 24, 2011, 03:28

Quote:

Originally Posted by marupio

You could probably capture the methane and temperature transport using scalar transport - combine scalarTransportFoam with a turbulent solver like pimpleFoam. For temperature transport, the "diffusion coefficient" would be your coefficient of conduction through the air. I think there's something you have to do to include the turbulence effects on the scalar transport equation. Not sure about that.

Dear Marupio, thank you for your kind response. I am very new to this software so i do not know how to combine two solver. Can I use pimple foam instead?

Quote:

Originally Posted by mturcios777

With any of the solvers you mentioned (dieselFoam, XiFoam and reactingFoam), you can turn off reactions by switching the option for chemistry off in the constant/chemistryProperties file.

Thank you for the suggestion. I will try this.

marupio · November 24, 2011, 09:33

Hi jundika,

No you can't just use pimpleFoam because it doesn't include scalar transport. Try Macro's suggestion... I don't know much about those reacting solvers.

November 22, 2011, 20:52	[Ask] Methane and temperature distribution in mining	#1
jundika New Member jundika Join Date: Oct 2011 Posts: 3 Rep Power: 14	Dear All, I am very new to OpenFOAM. I am trying to simulate temperature and methane distribution in underground coal mine (turbulent flow with heat and species transport no reaction). I have gone through the user manual to see which tutorial is appropriate for it. However, I could not find the appropiate one. reactingFoam, dieselFoam and XiFoam seem suitable but it has reaction while mine is not. Is there any suggestion for newbie like me? Jundika

November 23, 2011, 11:09		#2
marupio Senior Member David Gaden Join Date: Apr 2009 Location: Winnipeg, Canada Posts: 437 Rep Power: 22	You could probably capture the methane and temperature transport using scalar transport - combine scalarTransportFoam with a turbulent solver like pimpleFoam. For temperature transport, the "diffusion coefficient" would be your coefficient of conduction through the air. I think there's something you have to do to include the turbulence effects on the scalar transport equation. Not sure about that. __________________ ~~~ Follow me on twitter @DavidGaden

November 24, 2011, 09:33		#5
marupio Senior Member David Gaden Join Date: Apr 2009 Location: Winnipeg, Canada Posts: 437 Rep Power: 22	Hi jundika, No you can't just use pimpleFoam because it doesn't include scalar transport. Try Macro's suggestion... I don't know much about those reacting solvers. __________________ ~~~ Follow me on twitter @DavidGaden

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November 23, 2011, 12:29		#3
mturcios777 Senior Member Marco A. Turcios Join Date: Mar 2009 Location: Vancouver, BC, Canada Posts: 740 Rep Power: 28	With any of the solvers you mentioned (dieselFoam, XiFoam and reactingFoam), you can turn off reactions by switching the option for chemistry off in the constant/chemistryProperties file.