Re: [Yade-users] [Question #707788]: Porosity in rotated measuring area

2024-01-07 Thread Paul Schröder
Question #707788 on Yade changed:
https://answers.launchpad.net/yade/+question/707788

Paul Schröder posted a new comment:
Hi Karol,

Changing the position of the particles and facets relative to the analysis 
volume is an interesting approach. Since I stop the movements in the simulation 
space to evaluate the current state anyway, the whole thing should be possible 
with a simulation that continues afterwards.
However, I used the following solution for myself: The analysis cell for 
porosity detuning is moved to different positions and kept parallel to the 
coordinate axes. The particles and facets do not need to be moved. In the areas 
where the porosity measurement space is partially outside my test space, I then 
correct the calculated porosity with a factor. This correction factor is made 
up of the total measuring volume of the "voxelPorosity()" function and the test 
volume in that area. Since there are no particles in the remaining area, I can 
only calculate the porosity for the examined space.

Your help was another inspiration for me, thank you very much!
Paul

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Re: [Yade-users] [Question #707788]: Porosity in rotated measuring area

2023-09-15 Thread Launchpad Janitor
Question #707788 on Yade changed:
https://answers.launchpad.net/yade/+question/707788

Status: Needs information => Expired

Launchpad Janitor expired the question:
This question was expired because it remained in the 'Needs information'
state without activity for the last 15 days.

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Re: [Yade-users] [Question #707788]: Porosity in rotated measuring area

2023-08-30 Thread Karol Brzezinski
Question #707788 on Yade changed:
https://answers.launchpad.net/yade/+question/707788

Status: Open => Needs information

Karol Brzezinski requested more information:
Hi Paul,

Do you need to measure the porosity on the fly (required to trigger some
actions in the simulation)? If it can be done in postprocessing, the
simplest way would be using axis aligned porosity function and rotating
the sample.

Cheers,
Karol

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[Yade-users] [Question #707788]: Porosity in rotated measuring area

2023-08-30 Thread Paul Schröder
New question #707788 on Yade:
https://answers.launchpad.net/yade/+question/707788

Hello dear YADE community,

I would like to determine the porosity locally in a delimited area in the 
experimental space on which my simulation is based. In principle, the command 
"voxelPorosity()" seems to be well suited for this purpose [1]. The application 
of the command itself works quite well. 
If I have understood the command correctly, the area to be analyzed with the 
given vertices is spanned by a cuboid, parallel to the coordinate axes [2]. 
However, I am afraid that my further requirements can thus not be completely 
fulfilled:
I want to sample a cylindrical experimental space locally with respect to 
porosity. This means for the porosity determination that I want to rotate this 
cuboid or here specifically as a cube around the z-coordinate. For this 
rotation I can for example specify a quaternion with, which the 
"voxelPorosity()".however does not pick up. How can I determine the porosity of 
a cube (filled with spherers) rotated around the z-axis?

I am looking forward to help and hope to find a solution to the problem,
with best wishes, Paul

[1] https://answers.launchpad.net/yade/+question/690057
[2] https://answers.launchpad.net/yade/+question/384899

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