buoyantBoussinesqSimpleFoam for water impinging jet flow

amine hero · April 24, 2016, 21:31

hi
i have a question

i have simulated a water impinging jet flow (incompressible case is water )
i chose buoyantBoussinesqSimpleFoam solver
is correct or not
if is not correct ???
and

simplefoam+Temperature equation or buoyantBoussinesqSimpleFoam

what is the best solver for this case ( impinging jet flow with water is the fluid)
this is my question please help me and thank you for all
amine

Tobi · April 25, 2016, 02:43

Hello Amine,

the solver you have to choose is dependend on the phenomena's you have. If you have buoyancy driven flow, you need the buoyancy term that forces the fluid to flow. Hence you should use buoyant...Foam.

SimpleFOAM + Temperature equation will not fulfill buoyancy if you not add the buoyancy force. Boussinesq Approximation is only fulfilled if you have only density change of 2-5% (for water), otherwise I would prefer to use the normal buoyant...Foam.

FInally your question has to be answered by yourself.

rakesh927 · December 7, 2016, 05:22

Hi Tobi,

kindly suggest a solver for a single-phase transient case involving, forced convections [inlet velocity of fluid: water] + gravity. I have tried using buoyantBoussinesqPimpleFoam by setting thermal expansion coefficient (beta) = 0. But I couldn't find the effect of gravity in the simulation.

Kindly suggest how to proceed. Thanks

Tobi · December 10, 2016, 19:35

What about buoyantPimpleFoam?

Sent from my HTC One mini using CFD Online Forum mobile app

michaelaye · March 31, 2019, 06:12

Sorry to revive an old thread, but I was wondering if buoyantPimpleFoam can be used for supersonic flows? I see that HVAC is mentioned as a use case, which makes me a bit wary if it would work for supersonic flows. I am otherwise happy with sonicFoam, but I still need gravity after the flow has slowed down, specifically for the transport of particles in the flow.

It would be cool if buoyantPimpleFoam would work, otherwise I'll work on copying the gravity implementation over to sonicFoam, which hopefully will work.

Thanks for any advice!
Michael

April 24, 2016, 21:31	buoyantBoussinesqSimpleFoam for water impinging jet flow	#1
amine hero New Member amine heroual Join Date: Oct 2015 Posts: 4 Rep Power: 10	hi i have a question i have simulated a water impinging jet flow (incompressible case is water ) i chose buoyantBoussinesqSimpleFoam solver is correct or not if is not correct ??? and simplefoam+Temperature equation or buoyantBoussinesqSimpleFoam what is the best solver for this case ( impinging jet flow with water is the fluid) this is my question please help me and thank you for all amine

April 25, 2016, 02:43		#2
Tobi Super Moderator Tobias Holzmann Join Date: Oct 2010 Location: Tussenhausen Posts: 2,708 Blog Entries: 6 Rep Power: 51	Hello Amine, the solver you have to choose is dependend on the phenomena's you have. If you have buoyancy driven flow, you need the buoyancy term that forces the fluid to flow. Hence you should use buoyant...Foam. SimpleFOAM + Temperature equation will not fulfill buoyancy if you not add the buoyancy force. Boussinesq Approximation is only fulfilled if you have only density change of 2-5% (for water), otherwise I would prefer to use the normal buoyant...Foam. FInally your question has to be answered by yourself. arvindpj and amine hero like this. __________________ Keep foaming, Tobias Holzmann

December 10, 2016, 19:35		#4
Tobi Super Moderator Tobias Holzmann Join Date: Oct 2010 Location: Tussenhausen Posts: 2,708 Blog Entries: 6 Rep Power: 51	What about buoyantPimpleFoam? Sent from my HTC One mini using CFD Online Forum mobile app __________________ Keep foaming, Tobias Holzmann

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December 7, 2016, 05:22		#3
rakesh927 New Member rakesh Join Date: Jul 2015 Location: Nagpur, India Posts: 16 Rep Power: 10	Hi Tobi, kindly suggest a solver for a single-phase transient case involving, forced convections [inlet velocity of fluid: water] + gravity. I have tried using buoyantBoussinesqPimpleFoam by setting thermal expansion coefficient (beta) = 0. But I couldn't find the effect of gravity in the simulation. Kindly suggest how to proceed. Thanks

March 31, 2019, 06:12		#5
michaelaye New Member K.-Michael Aye Join Date: Oct 2014 Posts: 2 Rep Power: 0	Sorry to revive an old thread, but I was wondering if buoyantPimpleFoam can be used for supersonic flows? I see that HVAC is mentioned as a use case, which makes me a bit wary if it would work for supersonic flows. I am otherwise happy with sonicFoam, but I still need gravity after the flow has slowed down, specifically for the transport of particles in the flow. It would be cool if buoyantPimpleFoam would work, otherwise I'll work on copying the gravity implementation over to sonicFoam, which hopefully will work. Thanks for any advice! Michael