[Andrea1984]

Hi,

I would like to simulate a forced convection heat transfer problem using OF. The flow is incompressible and turbulent.

Any hints for the choose of the right solver, BCs and other settings are welcome.

Thanks,

Andrea

[romant]

Originally Posted by Andrea1984

Hi,

I would like to simulate a forced convection heat transfer problem using OF. The flow is incompressible and turbulent.

Any hints for the choose of the right solver, BCs and other settings are welcome.

Thanks,

Andrea

For heat transfer problems with incompressible flow, take a look at bouyantBoussinesqSimpleFoam and buoyantBoussinesqPimpleFoam, for steady state and transient calculations respectively. There are a couple of tutorials included in OpenFOAM

[Andrea1984]

Hi Roman,

thank you for your reply.
These solvers are suitable only for buoyant flows, or are still valid in case of forced convection?

[romant]

yes, they are also valid for forced convection. The "buoyant" part of the name just states that they use the boussinesq approximation for buoyancy, where small changes in density are modeled through a temperature difference. but other than that the density is constant.

[Andrea1984]

Ok, their names are a little bit misleading.
I'll have a look to the source code and run some test cases.

Thank you for the infos.

Andrea

[romant]

Hej,

it doesn't really matter that the buoyant part this is in the solver, since in forced convection your change in density and the buoyancy forces associated with it will be minimal (the flow will not be affected by it). Therefore, the solvers can be used for forced convection and for natural convection.

[cm_jubayer]

Hi Andrea,

I am also simulating forced convection over a solar panel in the atmospheric boundary layer. I am using buoyantBoussinesqPimpleFoam. Based on nOuterCorrectors you can switch between Pimple and Piso. Also, I am using 0 gravity which makes p and p_rgh same. However, I am facing bounding problem with omega specially (using SST k omega), trying different limited schemes, no luck yet.

But, to test the solver, I ran a simulation with forced convection over a flat plate with high Re and found a good match with the turbulent boundary layer correlation in theory. Also, I think to solve forced convection correctly, boundary layer has to be resolved completely (y+<1) without using wall functions.

Jubayer

[Andrea1984]

Hi Jubayer,
Unfortunately I had to stop my testing with OF in forced convection because right now I'm pretty busy with other undertakings; however I would be glad if you can attach your convection over a flat plate case.

Thanks in advance,

Andrea

[cm_jubayer]

You can download it from here


Jubayer

[Andrea1984]

Thank you so much

Andrea

[aamo]

Originally Posted by cm_jubayer

You can download it from here


Jubayer

Hi Jubayer, I think you have removed the files from your dropbox. could u please upload it again.

[cm_jubayer]

Here is the link again:

https://dl.dropboxusercontent.com/u/...atPlate.tar.gz


Jubayer

[sandeeprapol]

Hi,
I would like to simulate a forced convection heat transfer problem using OpenFOAM. The flow is compressible and turbulent. Which solver is suitable?


Thanks & Regards,
Sandeep Rapol

[romant]

Originally Posted by sandeeprapol

Hi,
I would like to simulate a forced convection heat transfer problem using OpenFOAM. The flow is compressible and turbulent. Which solver is suitable?


Thanks & Regards,
Sandeep Rapol

Take a look at this site http://cfd.direct/openfoam/user-guid.../#x13-890003.5

You probably want to take one of the solvers from the compressible family. They are nicely explained there and you should think about whatelse your solver should do. Steady state or transient, supersonic or subsonic flow, do you want to include buoyancy at a later stage (then take a look at the heat transfer solver family).

It shouldn't be too hard to find the right solver for your purpose.

[roadRunner]

Setting gravity vector to zero should disable all buoyancy effects and enable pure forced convection.

[Kim97]

What BC to be used in the p_rgh file for foced convection?

[mbennour]

Hi Jubayer, I'm doing my Master thesis on Openfoam could you please upload again the removed files from your dropbox. thank you very much

[Kim97]

Originally Posted by cm_jubayer

You can download it from here


Jubayer

I am trying to simulate a forced convection heat transfer problem using OpenFOAM. In my case, the hot flow flows through a pipe and the outside of the pipe is cooled by jet impingement. I am using chtMultiregionSimpleFoam and so far no luck and the tutorial is not much of a help. I am wondering if you still have your simulation with forced convection over a flat plate. If you do, would it possible for you to upload it again?

[mbennour]

Originally Posted by cm_jubayer

You can download it from here


Jubayer

hi Jubayer
I'm doing my Master thesis on Openfoam could you please upload the removed files on dropbox
thank you very much

[hello77]

Originally Posted by romant

Hej,

it doesn't really matter that the buoyant part this is in the solver, since in forced convection your change in density and the buoyancy forces associated with it will be minimal (the flow will not be affected by it). Therefore, the solvers can be used for forced convection and for natural convection.

hi, could you please justify this for me. I mean is the Boussinesq can be used in forced convection?