Time step factor in Code_Saturne 2.3

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Martin Isack

Time step factor in Code_Saturne 2.3

Post by Martin Isack »

Hello,

where can I change the Time Step Factor in the new GUI?

Best regards

Martin
Jacques Fontaine
Posts: 118
Joined: Mon Feb 20, 2012 2:07 pm

Re: Time step factor in Code_Saturne 2.3

Post by Jacques Fontaine »

Hello,
Could you be more precise? (ex.: the name of the keyword)
Regards,
Martin Isack

Re: Time step factor in Code_Saturne 2.3

Post by Martin Isack »

Hello,

the keyword was CDTVAR and the XML tag <time_step_factor>.

Regards

Martin
Jacques Fontaine
Posts: 118
Joined: Mon Feb 20, 2012 2:07 pm

Re: Time step factor in Code_Saturne 2.3

Post by Jacques Fontaine »

Hello,

There is many changes in the GUI 2.3, and we forgot to re-add this option.
This will be fixed in the next version 2.3.2.

By the way, you can impose cdtvar(iscal) in cs_user_parameters.c.
Thank you for your feedback.
JF
Yvan Fournier
Posts: 4250
Joined: Mon Feb 20, 2012 3:25 pm

Re: Time step factor in Code_Saturne 2.3

Post by Yvan Fournier »

Hello,

In case you were wondering, I'll add that for SYRTHES coupling, an independent time step factor (which should be set at the same value in most cases) may be set in cs_user_coupling.c.

This is still only usable with non-time varying time steps, as for time varyng time step, the time step is computed later in the time step than the SYRTHES synchronization (and changing this only a few months before release of version 3.0 would be too risky, so this type of modification won't be available before verson 3.1, near March or April 2013, though it may be available in the developpement "trunk" earlier than that).

Regards,

Yvan
flyer
Posts: 18
Joined: Mon Mar 26, 2012 2:37 pm

Re: Time step factor in Code_Saturne 2.3

Post by flyer »

hello,
I have a time dependent boundary conditions (for wall). First I started by simulating my problem in a steady state (time independent). Then I simulated the problem in a transient case with time independent boundary conditions. After that I have tried to simulate the problem in transient case with time dependent boundary conditions (I have imposed a function). However, I have notice that the program does not take into account the variation (time variations) of boundary conditions.
regards.
Yvan Fournier
Posts: 4250
Joined: Mon Feb 20, 2012 3:25 pm

Re: Time step factor in Code_Saturne 2.3

Post by Yvan Fournier »

Hello,

Could you post youx XML file so we can test with similar MEI expressions ?

Best regards,

Yvan
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