[mitsushi]

Hello,
Is there a means to safely abort the solver while it is running?
For example, when the solver run is taking longer than expected, or when the simulation result looks well converged based on the monitored values before completing the specified number of cycles..

[dstandingford]

Hi Mitsushi.

Thank you for your question about zCFD. To safely stop the solver while running a steady-state simulation, just change the value for the keyword 'cycles' in the 'time marching' section of the Python input dictionary to be less than the current cycle. On the next output cycle, the file will be re-parsed and the keyword values updated. Thus the solver will complete, producing the normal outputs. For an unsteady simulation, just change the value of the 'total time' keyword in the 'time marching' > 'unsteady' section, for the same effect. The other keywords are listed in the online user guide: https://zcfd.zenotech.com/docs.

Best wishes,

The zCFD Team.

[mitsushi]

Hello David,

Thank you very much!

But it did not work ..
I am running the naca0012 validation case.

The value for the "cycles" keyword was originally 50000 and I changed it to 100, but the solver keeps running beyond 100 cycles.

Would you please have a look?

Regards,
Mitsushi

[dstandingford]

Hi Mitsushi - that sounds odd. Could you send us the modified input file?

[mitsushi]

Hi David,

I have tried it again and it worked (i.e. aborted the solver run safely) this time!
Thank you very much for your help!

Regards,
Mitsushi

[dstandingford]

Thanks for letting us know. Also - a good way of checking that the control dictionary is OK is to activate the zCFD environment, and then run Python:

(zCFD)> python your_dictionary.py

This won't run the solver, but it will check the syntax.

Best wishes,

The zCFD Team.

[mitsushi]

Thank you!