Learning Forum

[Mariah Ha]

Hi, 

I am running a simulation in FDTD and would like to ensure that the auto-shutoff level is below 1e-05, as recommended in the tutorials. However, I obtained this graph. The auto-shutoff level suddenly increases at some point in the simulation after reaching 1e-04. Is there any explanation for this issue? I could not find a reason for the autoshutoff to not continue decreasing until 1e-05. 

Thank you.

[Niki Papachristou]

Hi Mariah,

Thank you for reaching out to us! Have you changed any of your simulation parameters (simulation time, auto-shut off level) to see if you get any different behavior? You might find this post helpful: Questions Regarding Autoshutoff level

Kind Regards,

Niki  

[Mariah Ha]

Thank you for the reply. Yes I changed the simulation time but kept the autoshut off level the same 1e-05. When I set the simulation time to 2000 ps the autoshutoff is around 4e-05, so I increased the simulation time to 3000ps to see what is the exact time the simulation will terminate , and thought I could record something around 2400ps . However, this did not happen, and I noticed that the shutoff level showed that strange increase at some point of the simulation, after 2000ps. Does it mean that the simulation time I set is too long? But why it did not just shut when the simulation is around 2400ps or so ? 

[Niki Papachristou]

Hi Mariah,

Thank you for coming back, can you please confirm that after the complition of the simulation the auto shut off status is 2? I am affraid that you have been looking the progress of the auto shut off level and not the full completion. I would suggest to check the graph after the completion:

If this drops from 1 to 0 then the simulation reached the autoshut off level as expected.

Regards,

Niki

[Mariah Ha]

Hi, yes I have been looking at the progress of the autoshutoff level. Yes the status is 2 and it is the required graph. Thank you very much.