noisze

[2018-2025]

As u can see, I want to know why this picture has so much noise? how can i reduce it?

[2018-2025]

input.txt This is my input.deck

[Status-Mirror]

PIC codes produce noisy data, but there are ways to reduce the noise.

You could:

• Increase the particles per cell to reduce simulation noise.
• Output data averaged over a few timesteps as described in the "data averaging" section of this page.
• Re-bin data in your plotting tool into larger bins, and average over local cells.

Hope this helps, Stuart

[2018-2025]

Thank you for your reply, and i want to know if i can use the average and subset of field together? Because i note if i use them together, the SDF seems not include average.

[2018-2025]

it seems just include subset(core_field1),

[2018-2025]

i think it should be cell.Electric_Field.Ey_averaged.data;

[Status-Mirror]

Hey @2018-2015

You can get averaged fields of the full grid, and non-averaged subset grids in the same simulation by using:

ey = always + field1 + average

Which returns the variables:

• Electric_Field.Ey.Core_field1.data
• Electric_Field.Ey_averaged.data

But it seems you can't currently get averaged inside a subset. I will look to see how viable this would be to add to the code.

Cheers, Stuart