Re: [Yade-users] [Question #706774]: Gradation curve of assembly made of clumps

2023-05-26 Thread Afaan Ahsan
Question #706774 on Yade changed:
https://answers.launchpad.net/yade/+question/706774

Afaan Ahsan posted a new comment:
Hello!

Calculating the gradation curve of an assembly consisting of clumps involves 
determining the distribution of particle sizes within the clumps and then 
analyzing the overall particle size distribution. Here are some steps you can 
follow:
Break down the clumps: Start by breaking down the clumps into individual 
particles. This can be done manually or using sieving techniques, depending on 
the size and nature of the clumps.

Obtain particle size data: Measure the size of each individual particle
using appropriate techniques such as sieve analysis, laser diffraction,
or sedimentation. This will give you a dataset of particle sizes.

Determine the frequency distribution: Organize the particle size data
into a frequency distribution table or graph, showing the number or
percentage of particles falling within specific size ranges.

Calculate cumulative distribution: Calculate the cumulative distribution
by summing up the frequencies or percentages for each size range. This
will give you the cumulative percentage of particles smaller than or
equal to a particular size.

Plot the gradation curve: Plot the cumulative distribution on a graph, with the 
particle size on the x-axis (typically on a logarithmic scale) and the 
cumulative percentage on the y-axis. This curve represents the gradation of the 
assembly.
It's worth noting that the accuracy and precision of the gradation curve depend 
on the sample size and the representativeness of the particles obtained from 
the clumps. Consider using a representative sample and conducting multiple 
tests for more reliable results. https://apkbgmi.com/

I hope this helps! Let me know if you have any further questions.

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Re: [Yade-users] [Question #706774]: Gradation curve of assembly made of clumps

2023-05-24 Thread Ruidong LI
Question #706774 on Yade changed:
https://answers.launchpad.net/yade/+question/706774

Status: Answered => Solved

Ruidong LI confirmed that the question is solved:
Thank you so much. That solved my problem.

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Re: [Yade-users] [Question #706774]: Gradation curve of assembly made of clumps

2023-05-24 Thread Jan Stránský
Question #706774 on Yade changed:
https://answers.launchpad.net/yade/+question/706774

Status: Open => Answered

Jan Stránský proposed the following answer:
> what I need is the calculation of the gradation curve in general

In general it is same as you would do it experimentally.
For a set of defined "passing" sizes, you count particles smaller than that 
size.
See implementation of psd function [2]

> And I don't know how to calculate the size of a clump. More specially,
I don't know which length can represent the size of the clump and be
used for gradation calculation. The length of the longest axis?

Depends on your definition.
Calculation then should not be too difficult.

Longest axis is one choice.
For real sieve analysis, probably the longest size is not the most important, 
as it would pass "perpendicularly" to the longest axis? So maybe the second 
longest principal axes? Or longest dimension perpendicular to the longest axis? 
I don't know..
There are more options.

> I have shared some STL files for your reference

Please see [1], section "Please, no external links!".
An artificial simple example should be enough.

Cheers
Jan

[1] https://www.yade-dem.org/wiki/Howtoask
[2] https://gitlab.com/yade-dev/trunk/-/blob/master/py/utils.py#L1089

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Re: [Yade-users] [Question #706774]: Gradation curve of assembly made of clumps

2023-05-24 Thread Ruidong LI
Question #706774 on Yade changed:
https://answers.launchpad.net/yade/+question/706774

Status: Needs information => Open

Ruidong LI gave more information on the question:
Hello, Jan.

Actually,  what I need is the calculation of the gradation curve in
general. I have an assembly of clumps generated based on imported stl
files. And I would like to obtain the gradation curve of the assembly. I
am new to the numerical simulation. And I don't know how to calculate
the size of a clump. More specially, I don't know which length can
represent the size of the clump and be used for gradation calculation.
The length of the longest axis?  I have shared some STL files for your
reference [1].

Looking forward to your reply. Many thanks.

Ruidong

[1]https://drive.google.com/file/d/1W2P2W0uxf4ktOTbc7lNxdJojZlntXWxO/view?usp=sharing

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Re: [Yade-users] [Question #706774]: Gradation curve of assembly made of clumps

2023-05-24 Thread Jan Stránský
Question #706774 on Yade changed:
https://answers.launchpad.net/yade/+question/706774

Status: Open => Needs information

Jan Stránský requested more information:
Hello,

please provide a MWE [1]. A few simple clumps and expected result.

Please also state where the actual problem is.
Calculation of gradation curve in general?
Treating of clumps?
...?

Cheers
Jan

[1] https://www.yade-dem.org/wiki/Howtoask

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[Yade-users] [Question #706774]: Gradation curve of assembly made of clumps

2023-05-24 Thread Ruidong LI
New question #706774 on Yade:
https://answers.launchpad.net/yade/+question/706774

Hello! I would like to know how to calculate the gradation curve of an assembly 
consisting of clumps. Many thanks.

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