Dear users,
Do anybody know how to use voronoi package? I compiled it in my liggghts, but it didn't work. I want to calculate the voidage. or is there any other command to calculate void ratio?
A project by DCS Computing and CFDEMresearch
This website uses cookies to ensure you get the best experience on our website. By continuing to browse the site you are agreeing to our use of cookies. This website uses cookies. By continuing to browse the site you are agreeing to our use of cookies. More info
ckloss | Mon, 03/16/2015 - 11:22
Hi,
Hi,
I myself did not try the voronoii package, but I think it should work. Alternatively, there is fix ave/euler and dump euler/vtk. There is no doc for it so you'll have to look into the source code
Christoph
nasato | Mon, 03/16/2015 - 13:19
Calculate Voronoi Tesselation
Calculate Voronoi Tesselation in LIGGGHTS:
1 – Add the following command lines to your input script (works also for a poly-disperse distribution):
compute VoroRadius all property/atom radius
variable r2 atom c_VoroRadius
compute voro all voronoi/atom radius v_r2
2 – Add the following command to the dump/custom to dump the Voronoi cell volume:
c_voro[1]
Ps.: See compute_voronoi_atom.html in the LIGGGHTS doc folder for other possible information that can be dumped.
Visualize void fraction in Paraview
1 – Open results files (after using LPP) in Paraview and add a calculator to the particle information:
Filters > Data Analysis > Calculator
2- Calculate particle volume: in “Result Array Name” insert “volume”. In the blank line below insert the expression:
(4/3)*3.14159265*radius^3
3 – Calculate void fraction: Add a new calculator. In “Result Array Name” insert VoidFraction. In the blank line below insert the expression:
(voro-volume)/voro
4 – Visualize void fraction: insert a Delaunay 3D triangulation. Go to:
Filters > Alphabetical > Delaunay 3D
5 – You can leave settings as default and click Apply. In coloring select VoidFraction. This should created a Volumetric data field of Void Fraction.
Cheers,
Nasato
andybond13 | Sun, 03/26/2017 - 20:02
Segfault
I'm running LIGGGHTS-PUBLIC 3.6.0. I've followed your directions, Nasato, but Liggghts segfaults at the first timestep that the dump/custom containing c_voro[1] is called.
K.cheng | Sat, 05/23/2015 - 09:40
could you tell me how to compile voronoi package?
Hi,xiaobaishu67:
I want to caldulate local voidage and i see your problem on the CFDEM forum . could you tell me how i can compile voronoi package? i also want to know whether you have used " compute atom/voronoi" command successfully . From your nickname , i guess you are Chinese and i am also Chinese . This is my qq: 374390895. please add me as friends and i would like to ask some questions.
Thanks,
K.cheng
qbbfjx | Thu, 09/20/2018 - 02:32
compile voronoi
Hi, K.cheng
I bet you have figured out how to compile voronoi and used the compute voronoi/atom function successfully. Could you please help me with it?
Thanks.
Rachel | Fri, 08/17/2018 - 09:32
Nice post
Have anyone sucessufully installed the voronoi package? I still don't know how to install this function. Could anyone please give me any clues?
Best,
Rachel
qbbfjx | Thu, 09/20/2018 - 06:04
Hi Rachel
Hi Rachel
I have the same issue. I followed the instructions to compile voro++ but when I ran simulation, it showed error which is 'invalid compute style'.
Have you figured it out?
Thanks.
Binbin
Jeff_DONG | Wed, 02/20/2019 - 03:22
done
download and compile Voronoi package before building LIGGGHTS would solve this problem