TAGGED: autoshotoff, fdtd, lumerical, photonics, resume
January 6, 2022 at 5:50 pmfdtdisgreatSubscriber
I'm currently performing an autoshutoff convergence test between 1e-7 and 1e-9. At the moment, I'm just setting the autoshutoff to a value in this range, letting the simulation run to completion, exporting the results via 'matlabsave', then resetting up the simulation with a different autoshutoff level. However, this is pretty inefficient, as I'm essentially running the first part of the simulation again and again.
Is there a way to pause or end the simulation at a given autoshutoff e.g. 1e-7, export the data via 'matlabsave' or a similar function, then resume the simulation until it reaches the next autoshutoff e.g. 3e-8, and so on?
Thank you in advance.January 13, 2022 at 1:38 amTaylor RobertsonAnsys Employee
Yes this doesn't seem to be the most efficient use of time, and fortunately we have a checkpointing feature that will allow you to continue your simulation from a certain point rather then starting over again. This is enabled in the FDTD object advanced options. If you have a checkpoint file from the file you can resume the simulation using resume option under run in the top toolbar.
Please see the Simulation Checkpoint section of the following reference.
January 15, 2022 at 2:13 amfdtdisgreatSubscriberThank you very muchJanuary 15, 2022 at 8:58 pmfdtdisgreatSubscriberI just tried to perform a sweep at different intervals of autoshutoff and it didn't work. I used the "checkpoint at autoshutoff" feature which did pause the simulation at 1e-7, but when I tried to reset the autoshutoff to 1e-8 and resume the simulation (after I had exported my data using matlabsave), I got an error - can't modify in Analysis Mode, need to switch to layout. Is there a way to change the autoshutoff at 1e-8 after pausing it at 1e-7?
February 5, 2022 at 2:08 amTaylor RobertsonAnsys EmployeeHey
Sorry I missed this, but you should be able to switch to layout resave the file and click resume. The only setting you can change is the auto-shutoff, but you should be able to do exatcly what you intend.
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