Combination of CDO solidification and CHT within the V9.0

[SS2X]

Hello,

Does the CDO solidification model being compatible with the conjugate heat transfer within the V9.0 ?

Thank you in advance.

Kind regards.

[Chai]

Hi SS2X,

Normally it is. Is there a specific problem / difficulty ?

[SS2X]

Hello Chai,

Thank your for your feedback. I think that I noticed in that forum that it was not possible, hence the question.

Kind regards.

[Jerome B.]

Hello Chaï and SS2X,

Using CHT and CDO solidifcation together is possible. The way to setup this problem is possible with user-defined source files since it is a full CDO computation (meaning that there is no call to the legacy Finite Volume functions). I don't think there is a example of such a case settings.

The spirit is closer to an "internal coupling" than a code-code coupling. So, you a need a single mesh (if you have two meshes, you can perform a joining). A solid volume zone has to be defined on a part of the computational domain. This can be done using the GUI (page called "Volume conditions").

There are still some limitations (this functionality is recent), for instance, a constant mass density (a Boussinesq approximation is done in the fluid part) and no turbulence modelling.

Best regards,
Jérôme.

[SS2X]

Hello Jérôme,

Thank you for your reply . Here below some complement from y side :

1) Regarding the mesh, I think that a bug or a functionality limitation occured, since the mesh joining (I have to get the operation's name afterwards and will give it here) was already performed on SALOMÉ and not double-face was detected at the fluid/solid boundary. and the same operation was performed along the boundary and despite this, the internal coupling was only activated on one of the border;

2) Using the soldification model in combination with the internal thermal coupling, an error arised by defining a value for the heat capacity in the fluid or solid zone. Moreover, would it be possible to have variable lambda and cp within the solidification model ? It seems that a case with CHT without CDO-solidification and fully-dedfined from the GUI writes in the ouput source order a file named "cs_meg_volume_function.cxx" (automatically written by CS) where the given law for thermal conductivity or heat capcity in each fluid or solid zone are implemented. I then tried to copy that file into the SRC order for the same case with solidification, the calculation ran, but the calculation was unstable. Would you then have a patch to combine the solidification model and varying lambda / cp (especially within the medium being simulated by the CDO-solidification model) or is it up-to-dae only compatible with CS properties defined as scalar ?

Thank you in advance for your intention .

Kind regards,

SS2X.