[mattmirsad]

Dear all,

I am very new to OpenFOAM and still trying to learn it through its tutorial. My aim is to use OpenFOAM in conjugate heat transfer problems (therefore chtMultiregionfoam is the solver I need).

Here is my question:
How can I apply a constant heat flux (W/m2) in openfoam on one of my boundary patches?

Thanks,
Matt

[Antimony]

Hi,

Does this BC not work for you: https://github.com/OpenFOAM/OpenFOAM...hScalarField.H ?

Cheers,
Antimony

[mattmirsad]

Dear Antimony,

Thanks for your reply.

Can this boundary condition be applied to a solid wall surface where a "compressible" gas is flowing on top?

I am asking this since there is an "incompressible" namespace in the file you sent.

Kind regards,
Matt

[Bloerb]

I was not aware, that there even is an imcompressible version. If you are using a recent openfoam version this is however definitely implemented (and this one can also be used for incompressible cases):

https://github.com/OpenFOAM/OpenFOAM...hScalarField.H

[ketanganatra0@yahoo.com]

Hi,
I am using buoyantBoussinesqSimpleFoam as slver for constant heat flux BC.

The error message is fluidthermopackage is not available'.

Can you help me with that???

[Vishsel]

Hi all,

As for as now i have only solid body. My case is Incompressible, Heat transfer, Steady state.

I need to create heat flux on the surface of the solid body (@wall). And my inputs are heat flux (W/m²) for surface or (W/m³) for body.
For example - These are my wall surfaces where I have to create heat flux

wall-mp-1
wall-mp-2
wall-dp-1
wall-dp-2

How can i prepare my 0 time folder for solid case and Which solver is suitable for my case ?


Thank you in advance.

[hokhay]

Originally Posted by Vishsel

Hi all,

As for as now i have only solid body. My case is Incompressible, Heat transfer, Steady state.

I need to create heat flux on the surface of the solid body (@wall). And my inputs are heat flux (W/m²) for surface or (W/m³) for body.
For example - These are my wall surfaces where I have to create heat flux

wall-mp-1
wall-mp-2
wall-dp-1
wall-dp-2

How can i prepare my 0 time folder for solid case and Which solver is suitable for my case ?


Thank you in advance.

Hi Vishsel, have you found your answer yet? I am facing the same as well. I am trying to use fixed gradient on T BC. This approach looks like numerically correct because heat flux = -k*grad(T) but I found that the simulation result generate much less heat than I expected and i don't know why.

Could you show how you do it if you have solved this problem?

Thanks a lot
Jason

[RajNPatil]

Originally Posted by Vishsel

Hi all,

As for as now i have only solid body. My case is Incompressible, Heat transfer, Steady state.

I need to create heat flux on the surface of the solid body (@wall). And my inputs are heat flux (W/m²) for surface or (W/m³) for body.
For example - These are my wall surfaces where I have to create heat flux

wall-mp-1
wall-mp-2
wall-dp-1
wall-dp-2

How can i prepare my 0 time folder for solid case and Which solver is suitable for my case ?


Thank you in advance.

Hi Vishsel,
For solver as far as I know, you should be able to use buoyantBoussinesqSimpleFoam, but this is valid when there is fluid present in your model, I am not sure for case with only solid.

If you want to implement it on solid then better you try to use chtMultiRegionFoam. For better understanding you can follow given link. https://cfd.fossee.in/case-study-pro...e-study-run/60
Download case study and follow through the file. Hope this will help you.