Lamella partition help!

[Dreamown]

I use python to develop a lamella partition software. This graph comes from that software. In each voronoicell, lamella of different thickness can be assigned to a different set in the software. However, the later-stage meshing presented great difficulties, and I am not an expert in meshing. To my surprise, neper also has the ability to lamella partition, but I have yet to figure out how to implement the collection of cells I described above like in my software.
Just like,in neper i can use below command to generate multiscale partition:
Neper -T -n 10::from_morpho -morpho ''gg::lamella(w=0.01:0.03)'' -o test

How do I go on? I hope you can help me

[rquey]

Yes, Neper does generate (and meshes) multi-scale / lamellar structures. See these papers:

• meshing: https://neper.info/papers.html#id1
• applications of lamellar structures: https://www.sciencedirect.com/science/article/pii/S0022509616306962 https://www.sciencedirect.com/science/article/pii/S0022509616306962

Example:

neper -T -n 10::from_morpho -morpho "gg::lamellar(w=0.01:0.03)" -o test -reg 1 -rsel 0.001
neper -M test.tess -pl 100
neper -V test.tess,test.msh -showelt1d all -dataelt1drad 0.003 -dataelt3dedgerad 0.001 -dataelsetcol "scaleid(1)" -print img1 -dataelsetcol id -print img2

[Ali141272]

Hello @rquey,
Professor when I run the same commands on Ubuntu I have face some error (BFGS Update error), I don't know why?
My Neper version is 4.6.0.
I used the following commands:

neper -T -n 10::from_morpho -morpho "gg::lamellar(w=0.01:0.03)" -o test -reg 1 -rsel 0.001
neper -M test.tess -pl 100
neper -V test.tess,test.msh -showelt1d all -dataelt1drad 0.003 -dataelt3dedgerad 0.001 -dataelsetcol "scaleid(1)" -print img1 -dataelsetcol id -print img2

Thank you.

[rquey]

Please always copy the terminal output as text (not as an image).

Your command contains 2 -morpho instances. Remove one and make -n consistent with it.

[Ali141272]

sajid@DESKTOP-UTRLKKU:/mnt/c/Ubuntu_softwares$ export OMP_NUM_THREADS=1
sajid@DESKTOP-UTRLKKU:/mnt/c/Ubuntu_softwares$ neper -T -n 20::from_morpho -morpho "gg::lamellar(w=0.01:0.03)" -o test -reg 1 -rsel 0.001 -morpho "diameq:lognormal(1,0.05),1-sphericity:lognormal(0.145,0.03)" -domain "square(0.05,0.1)" -d
im 2

======================== N e p e r =======================
Info : A software package for polycrystal generation and meshing.
Info : Version 4.6.0
Info : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info : Running on 1 threads.
Info : https://neper.info
Info : Copyright (C) 2003-2022, and GNU GPL'd, by Romain Quey.
Info : No initialization file found (/home/sajid/.neperrc'). Info : --------------------------------------------------------------- Info : MODULE -T loaded with arguments: Info : [ini file] (none) Info : [com line] -n 20::from_morpho -morpho gg::lamellar(w=0.01:0.03) -o test -reg 1 -rsel 0.001 -morpho diameq:lognormal(1,0.05),1-sphericity:lognormal(0.145,0.03) -domain square(0.05,0.1) -dim 2 Info : --------------------------------------------------------------- Info : Reading input data... Info : Creating domain... Info : Creating tessellations... Info : [level] Running in multiscale mode (2 scales)... Info : [ 1] 1/1 Info : - Setting seeds... 100% Info : - Generating crystal orientations... Info : - Running tessellation... Info : > Initial solution: f =7.668179813 Info : > Iteration 2306: fmin=0.000262055 f=0.000262075 Info : > Final solution : f =0.000262055 (2306 iterations) Info : > Reached eps' criterion.
Info : [ 2] 1/20 Error : . Could not process '-n from_morpho'.
Aborted (core dumped)

[Ali141272]

1. neper -T -n 20::from_morpho "gg::lamellar(w=0.01:0.03)" -o test -reg 1 -rsel 0.001 -morpho "diameq:lognormal(1,0.05),1-sphericity:lognormal(0.145,0.03)" -domain "square(0.05,0.1)" -dim 2
   Here I remove one -morpho and still show error:
   Error : Bad arguments!
   Aborted (core dumped)

2. neper -T -n 20::from_morpho -morpho "gg::lamellar(w=0.01:0.03)" -o test -reg 1 -rsel 0.001 "diameq:lognormal(1,0.05),1-sphericity:lognormal(0.145,0.03)" -domain "square(0.05,0.1)" -dim 2

Here I removed -morpho from the other side but in both cases not run and show error like;
Error : Bad arguments!
Aborted (core dumped)

[Ali141272]

neper -T -n 20::from_morpho -morpho "gg::lamellar(w=0.01:0.03)" -o test -reg 1 -rsel 0.001 -morpho "diameq:lognormal(1,0.05),1-sphericity:lognormal(0.145,0.03)" -domain "square(0.05,0.1)" -dim 2
Professor, this is the complete command you mentioned that you have used 2 -morpho instances.

[Ali141272]

Hllo @rquey I have run the commands:

neper -T -n 100:: -morpho "gg::lamellar(w=0.01:0.03)" -o test -reg 1 -rsel 0.001 -morpho "diameq:lognormal(2,0.04),1-sphericity:lognormal(0.055,0.03)" -domain "square(0.05,0.1)" -dim 2
neper -M test.tess -pl 100
neper -V test.tess,test.msh -showelt1d all -dataelt1drad 0.000001 -dataelt3dedgerad 0.001 -dataelsetcol "scaleid(1)" -print img1 -dataelsetcol id -print img5

But the png flile is totally black and when I open the test.msh file in Gmsh then there is no laminations.

Thank you.