Simulation of a multi-species problem

samiam1000 · January 20, 2017, 05:53

Dear All,

I am writing to ask you a general question about OpenFOAM solvers. I have a X-shaped channel: from inlet-1 air enters; from inlet-2 a different gas mixtures enters. I am sure I do not have any chemical reaction. What I would like to study is the species-transport and - above all - the concentration (and distribution) of O_2 on the outlets. Do you have any suggestion? Which is the right solver? Do you know if there is a tutorial solved?

tomf · January 23, 2017, 03:48

Hi, you can use reactingFoam with the reactions turned off for species mixing.

Just follow one of the original tutorials and get it to run without reacting.

Tom

samiam1000 · January 23, 2017, 05:48

That's great.
Thanks a lot Tom. I am gonna investigate this solver.

Thanks a lot,
Samuele

samiam1000 · January 26, 2017, 07:29

Hey Tom,

I was thinking..

..does this solution work with liquids, also?

Thanks a lot,
Samuele

tomf · January 26, 2017, 08:13

Hi,

Probably not, liquid-liquid mixing is different from gas-gas mixing. It depends on the solubility of the liquids. Think about oil in water or alcohol in water. I guess you need either interFoam or twoLiquidMixingFoam or maybe interMixingFoam, or perhaps even twoPhaseEulerFoam.

Regards,
Tom

January 20, 2017, 05:53	Simulation of a multi-species problem	#1
samiam1000 Senior Member Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 520 Rep Power: 18	Dear All, I am writing to ask you a general question about OpenFOAM solvers. I have a X-shaped channel: from inlet-1 air enters; from inlet-2 a different gas mixtures enters. I am sure I do not have any chemical reaction. What I would like to study is the species-transport and - above all - the concentration (and distribution) of O_2 on the outlets. Do you have any suggestion? Which is the right solver? Do you know if there is a tutorial solved?

January 26, 2017, 08:13		#5
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 634 Rep Power: 32	Hi, Probably not, liquid-liquid mixing is different from gas-gas mixing. It depends on the solubility of the liquids. Think about oil in water or alcohol in water. I guess you need either interFoam or twoLiquidMixingFoam or maybe interMixingFoam, or perhaps even twoPhaseEulerFoam. Regards, Tom BlnPhoenix likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Loosing Volume, High Simulation Time and Problem About stl File	thetitans	FLOW-3D	3	December 1, 2016 06:36
Multi Species Problem (mass fraction)	usamaperwez	CFX	0	July 27, 2016 07:07
Problem with DPM simulation with particles injection and EXECUTE_AT_THE_END UDF.	Ari	Fluent UDF and Scheme Programming	4	May 31, 2016 08:51
Problem with an old Simulation	FrankW	CFX	3	February 8, 2016 04:28
non-physical turbulence viscosity in coaxial free-jet simulation with species	Felipeb	FLUENT	3	August 2, 2010 09:27

January 23, 2017, 03:48		#2
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 634 Rep Power: 32	Hi, you can use reactingFoam with the reactions turned off for species mixing. Just follow one of the original tutorials and get it to run without reacting. Tom

January 23, 2017, 05:48		#3
samiam1000 Senior Member Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 520 Rep Power: 18	That's great. Thanks a lot Tom. I am gonna investigate this solver. Thanks a lot, Samuele

January 26, 2017, 07:29		#4
samiam1000 Senior Member Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 520 Rep Power: 18	Hey Tom, I was thinking.. ..does this solution work with liquids, also? Thanks a lot, Samuele