Reply To: Question regarding the auto shut off in FDTD simulation.

[Miller Testing]

 

 

Hi Amrita,

I did not see any mesh accuracy setting, because in the mesh setting, I use the custom non-uniform setting,

hence I did not see the mesh accuracy setting that I use. 

 

and for the convergence testing, I had tried the example from the link that you provided to me,

however, when I tried to do a convergence testing in my file by adding a sweep mesh accuracy parameters, I quite confuse, because there are no sigma in my grating_transmission function as show as the scattered function sigma in the example here. Is that affected by the amount of the dft monitors that we use in analysis function in the simulation? or the sigma inside the results of the parameters sweeps was added by using the script ?

 

is there any different setting between the example and mine? because I saw the example are using 4 monitors each in the analysis function, while mine only using 1 dft monitor in my function analysis. below is the picture from the example of convergence testing. Is it have an effect to add new parameters such as sigma in the simulation, I mean 1 dft monitor will not show a sigma result parameters inside the parameter sweep parameters instead of 4 dft monitor that we use in the simulation? 

and this one is mine only use 1 dft monitor in my analysis function in my structure. 

 

below is the example use the mesh dx, dy are 5 nm and dz is 0.0001 nm, 

and mine is 0.005 nm for dx,dy and dz

 

can you help to guide me regarding the convergence testing here? I am still quite unfamiliar with the setting here. 

Thank you for your kind support.

 

 

And I also found another explanation regarding my question here in this forum: /forum/forums/topic/question-about-autoshutoff-in-fdtd/

there are 4 links that are provided by Mr. Guilin Sun,

Ansys Insight: 为什么说仿真时间要足够长才能得到正确的频域结果

/forum/

Ansys Insight: FDTD仿真过程进度条结束显示100%，这样结果可靠吗？

/forum/forums/topic/ansys-insight-fdtdfangzhenguochengjindutiaojieshuxianshi100zheyangjieguokekaoma/

Ansys Insight: 关于Auto shut off min &auto shut of max

/forum/forums/topic/ansys-insight-%e5%85%b3%e4%ba%8eauto-shut-off-min-auto-shut-of-max/

Ansys Insight: 如何知道FDTD的仿真时间足够长

/forum/forums/topic/ansys-insight-%e5%a6%82%e4%bd%95%e7%9f%a5%e9%81%93fdtd%e7%9a%84%e4%bb%bf%e7%9c%9f%e6%97%b6%e9%97%b4%e8%b6%b3%e5%a4%9f%e9%95%bf/

I can open the 2nd, 3rd, and 4th links, but in the 3rd link, most of the words are “???”, therefore I did not know what kind of message or point that the Mr. Guilin Sun was trying to say. Can you help me clarify this? 

and for the 1st link, it seems to be missing or nowhere to be found because it redirects me to a forum ansys homepage?