code_saturne User's Forum

Hi
I'm looking to run a frozen turbulence RANS simulation. Once the turbulence field is initialised at the start of the simulation I wanted to switch off the update of the turbulence quantities for the subsquent time steps. The iccvfg=1 option turns off the update of the momentum equation as well but I want the velocity field to be updated.

What is the best way to achieve this?

Many thanks

Hello,

Though we plan adding cs_time_control_t options to fields so as to be able to have a finer control over when fields are updated, there is no such setting available today, so in your case, simply modifying the code to avoid the update of turbulence quantities is probably best.

Although this can be very useful fo debugging (to locate/pinpoint a change in results), updating the velocity while not updating the turbulent quantities, which are strongly coupled with the velocity, usually makes no sense in a production study.

Best regards,

Yvan