[resolved] Output Intervals logic is wrong

[uwestoehr]

I have a problem with the output interval logic and file name:

I have this setting in my case.sif:

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Output Intervals(2) = 1 1
  Timestep intervals(2) = 2 2
  Timestep Sizes(2) = 0.05 0.02

This gives me 4 *.vtu files as it should

but this input

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Output Intervals(2) = 2 2
  Timestep intervals(2) = 2 2
  Timestep Sizes(2) = 0.05 0.02

should give me just 2, but I get 3.

So I made an extreme case of no output at all:

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Output Intervals(2) = 3 3
  Timestep intervals(2) = 2 2
  Timestep Sizes(2) = 0.05 0.02

but I get 3 outputs.

and the second attempt to get no output:

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Output Intervals(2) = 0 0
  Timestep intervals(2) = 2 2
  Timestep Sizes(2) = 0.05 0.02

gives me 1.

So I don't get the output intervals logic. Can anybody help me please?

I also struggle to understand what output is for what file. For example I get this output file:

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case_t0002.vtu

it is unknown what time step 2 had. Depending on the output intervals setting, this could be 0.05 s or 0.1 s.
So is there an option to write the actual time to the file name. e.g.

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case_t000.050.vtu

means it was time 0.050 s
and

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case_t012.300.vtu

means it was time 12.3 s

[uwestoehr]

Code: Select all

Output Intervals(2) = 2 2
  Timestep intervals(2) = 2 2
  Timestep Sizes(2) = 0.05 0.02

should give me just 2, but I get 3.

OK, I get it now: the interval always begins with 1. So in every case you get a result for the first time of an interval. The third result is the final one.

I also struggle to understand what output is for what file.

an improvement for this issue would be very valuable because when I look at my results after e.g. half a year I cannot remember that time 2 was.

[hielau]

You can add time collection to your result vtu files.

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Vtu Time Collection = Logical True

It will create additional .pvd file that contains timestep information of each vtu file.

[uwestoehr]

Code: Select all

Vtu Time Collection = Logical True

It will create additional .pvd file that contains timestep information of each vtu file.

Many thanks! This is what I needed.
(This way I could eventually provide proper transient solving support for Elmer via FreeCAD.)