Energy Equation Subroutines and adding terms in it

[hyder4]

Dear Developers,
I just started PhD and my work is mostly on DNS. I want to add few terms in the energy equation.
Is it possible if you can point out what subroutine(s) the software solves the energy equation? and is there a way I can add terms in it?
Kind regards,
Hyder.

[hyder4]

Dear Developer,
I was wondering if there is any update on this?
Kind regards,
Hyder.

[Yvan Fournier]

Hello,

Which "energy equation" are you referring to exactly relative to the formulation and algorithm used in code_saturne ? Turbulent kinetic energy (not in DNS), thermal internal or total energy (for compressible flowà, ... ?

Did you check user examples in the documentation ?

Regards,

Yvan

[hyder4]

Hello,
Sorry I mean is this energy equation.

Eq 1.png

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or this

Eq 2.png

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.
Best regards,
Hyder.

[Yvan Fournier]

Hello,

So it seems that what you are interested in is the heat equation. What sort of terms do you need to add ? If it is source terms, that is easy, and there are many user-defined examples in the code. Some cases may even be handled in the GUI.

I also recommend starting with a very simple mesh and case so as to be able to experiment with a fast turnaround time.

Regards,

Yvan

[hyder4]

Hi,
The terms I want to add depends on what heat equation the code_saturne is solving at the moment. may I ask if its solving equation 1

Eq 1.png

(3.18 KiB) Not downloaded yet

or equation 2

Eq 2.png

(5.79 KiB) Not downloaded yet

?
One of my senior is also using code saturne. he believes code_saturne solves equation 1.
Best regards,
Hyder

[Yvan Fournier]

Hello,

The info on the equations solved is given in the first 20 pages of the theory manual.

Best regards,

Yvan

[hyder4]

Hi,
Just looked at it Thank you. I am also curious to know in what subroutines they are being solved. is there a way I can know that as well?
Best,
Hyder.

[Yvan Fournier]

Hello,

Depending on the code version (and progress on migration from Fortran to C), the exact files can vary, but you can start by looking at the "scalai" function, which contains the loop on scalars.

Regards,

Yvan