Incompressible, miscible mixing of two fluid stream OpenFOAM

Nishchal · June 22, 2012, 05:42

Hi,

I am very new to openFOAM and this forum. To get feel of OpenFOAM i decided to setup a test case involving mixing of two fluid stream (compressible and miscible).

It is not a two-phase situation i am dealing with, it is one phase (water) at two different temperatures mixing in a T-junction.

Can anyone suggest me which solver to use?

wyldckat · June 23, 2012, 15:49

Greetings Nishchal,

I'm no expert on this subject, so until someone more experienced responds, here's what I know...

If you check the folder "heatTransfer" in the OpenFOAM "tutorials" folder, you'll find these solver tutorials:

Quote:

Code:

buoyantBoussinesqPimpleFoam
buoyantBoussinesqSimpleFoam
buoyantPimpleFoam
buoyantSimpleFoam
buoyantSimpleRadiationFoam
chtMultiRegionFoam
chtMultiRegionSimpleFoam

"Simple" ones are for stationary simulations; "Pimple" ones are for transient simulations; "chtMultiRegion" ones are for multiple mesh domains with different fluids/solids.

Best regards,
Bruno

inf.vish · July 31, 2013, 01:18

Hi Nishchal,
Did you find out which solver to use and what boundary conditions to use?
I am also looking at the same problem and have been stuck on it for three days now. I am not able to find this simple example anywhere.

Annier · July 31, 2013, 09:52

since the pure substance is having different thermodynamic states before mixing, it may be somehow relevant to treat them as two different fluids? if the compressibility can be ignored, twoLiquidMixingFoam is there as a standard solver in OpenFoam. otherwise, you need to modify this solver by adding the codes related to the compressibility of the fluids. still you can search for other relevant solvers which may best fit your physical model.

inf.vish · July 31, 2013, 09:54

i used buoyantBoussinesqSimpleFoam. But i will try with twoLiquidMixingFoam also. Thanks

mbennour · October 8, 2019, 08:28

hi Vishal
I'm new with openfoam and I want to ask you how did you setup you boundary Condition for U and T ( in my case i have two Outlets and two Inlets and two fluids with different temperature that they wil be mixed up ) I'm using also buoyantBoussineqsSimpleFoam.
thank u so much for any inofrmation

mbennour · October 9, 2019, 06:55

Hi Annier,
how could you set up the temperature of your fluids with twoLiquidMIxingFoam solver?
In my case have to mix up to liquid with two different temperature (cold and hot Water)
thx

June 22, 2012, 05:42	Incompressible, miscible mixing of two fluid stream OpenFOAM	#1
Nishchal New Member N Agrawal Join Date: Jun 2012 Posts: 4 Rep Power: 13	Hi, I am very new to openFOAM and this forum. To get feel of OpenFOAM i decided to setup a test case involving mixing of two fluid stream (compressible and miscible). It is not a two-phase situation i am dealing with, it is one phase (water) at two different temperatures mixing in a T-junction. Can anyone suggest me which solver to use?

July 31, 2013, 09:52	multiphase flow solver would be the option in my guess	#4
Annier Member Anil Kunwar Join Date: Jun 2013 Posts: 64 Rep Power: 11	since the pure substance is having different thermodynamic states before mixing, it may be somehow relevant to treat them as two different fluids? if the compressibility can be ignored, twoLiquidMixingFoam is there as a standard solver in OpenFoam. otherwise, you need to modify this solver by adding the codes related to the compressibility of the fluids. still you can search for other relevant solvers which may best fit your physical model.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Newbie: advantages/disadvantages of "penalty formulation" incompressible fluid flow	bzz77	Main CFD Forum	2	November 1, 2011 03:32
Placing second fluid in OpenFOAM.	vivek070176	OpenFOAM	5	June 30, 2011 18:33
mixing of non reacting miscible fluids	Himanshu Arora	FLUENT	0	June 13, 2005 04:17
internal steady incompressible inviscid fluid flow	Nina Shokina	Main CFD Forum	0	October 21, 2003 06:11
Terrible Mistake In Fluid Dynamics History	Abhi	Main CFD Forum	12	July 8, 2002 09:11

July 31, 2013, 01:18		#3
inf.vish Member Vishal Join Date: Jul 2013 Posts: 73 Rep Power: 12	Hi Nishchal, Did you find out which solver to use and what boundary conditions to use? I am also looking at the same problem and have been stuck on it for three days now. I am not able to find this simple example anywhere.

July 31, 2013, 09:54		#5
inf.vish Member Vishal Join Date: Jul 2013 Posts: 73 Rep Power: 12	i used buoyantBoussinesqSimpleFoam. But i will try with twoLiquidMixingFoam also. Thanks

October 8, 2019, 08:28		#6
mbennour New Member Mohamed Bennour Join Date: Sep 2019 Posts: 5 Rep Power: 6	hi Vishal I'm new with openfoam and I want to ask you how did you setup you boundary Condition for U and T ( in my case i have two Outlets and two Inlets and two fluids with different temperature that they wil be mixed up ) I'm using also buoyantBoussineqsSimpleFoam. thank u so much for any inofrmation

October 9, 2019, 06:55		#7
mbennour New Member Mohamed Bennour Join Date: Sep 2019 Posts: 5 Rep Power: 6	Hi Annier, how could you set up the temperature of your fluids with twoLiquidMIxingFoam solver? In my case have to mix up to liquid with two different temperature (cold and hot Water) thx