code_saturne User's Forum

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With Code_Saturne, how can we be sure that the calculation is converged ?
Especially for a transient calculation, which parameter we should check in listing file for convergence of each time step ?

Could you explain each parameter in the listing file : Rhs norm; Norm Residual, Drift, Time ...

Hello Yvan,

actually I understood one part of my issue :

time step for natural convection is very low, and strangely my heatrod needs 3 hours to heat (radius <0.01 m)
So to do coupling, I have to do a lot of iterations with a minimal time step, and I haven't done that yet
That explains my issue ...

So I have a surfacic coupling for my case

But volumetric source term or surfacic flux in Syrthes are not took into account when I try coupling
In regards to the files i sent to you, do you have any suggestion to solve this problem ?

Thank you very much

Jeremy

I think I have a surfacic coupling, between the heatrod and the fluid, right ?

In Salome, my Solid is 2D and my fluid domain is 3D with 1 cell size following Oz

What is the difference between surfacic and volumic coupling btw ?

Thank you

Jeremy

I think I have just understood where the issue is :

my system is 2D axisymmetric

When I impose a Surfacic flux or Volumetric source term by using Syrthes alone, I got no issue

But if I want to do the same in coupling calculation, they are no longer took into account

Do you know why and how I can ...

I think i found the solution :

when doing a coupling calculation, if the file syrthes.stop is in the folder Solid , it will stop the calculation at the first time step

Using Syrthes alone solves this issue, because it deletes this file before calculation
But coupling calculation with ./runcase ...

Here's log files

Here's more files

Hello,

I am using Salome CFD 8.5 for Scibian

I am trying to do a coupling of an heatrod (2 solids) inside a cylinder full of air
When I do some tests only on Syrthes, I succeed to simulate the volumetric source term inside the first solid of the heatrod (the wire) (despite I had some difficulties ...

Hello,

I got the same error

Do we have a solution for CTrinca 's problem ?
Best regards,

Jérémy