Comment 4 for bug 513548

 sampleRadius = 60.0
sampleHeight = 180.0
corresponding radius and height of the sample.

centrePt = Vec3(sampleRadius,0.0,sampleRadius) Central point
normalV = Vec3(0,1,0) Vector, which indicates the direction of your
cylinder

______________________________

Anton Gladkyy

2010/2/9 Jessica <email address hidden>

> Hello!!!
>
> I find the script very useful in packing unbonded particles in cylinder.
> But I have few questions regarding the script.
> I wanted to know what are these parameter corresponds.
>
> sampleRadius = 60.0
> sampleHeight = 180.0
> centrePt = Vec3(sampleRadius,0.0,sampleRadius)
> normalV = Vec3(0,1,0)
>
> --
> LSMGenGeo: non-uniform particle density when packing cylinders
> https://bugs.launchpad.net/bugs/513548
> You received this bug notification because you are subscribed to ESyS-
> Particle.
>
> Status in ESyS-Particle: HPC Discrete Element Modelling Software: Fix
> Committed
>
> Bug description:
> When using LSMGenGeo to pack a cylinder with particles, it would appear
> that LSMGenGeo has a bias towards inserting larger particles near the top of
> the cylinder. I have noticed evidence for this in numerous UCS tests where
> the crown of the cylinder shows a greater propensity to fragment than the
> base of the cylinder (even when both ends are loaded at the same rate).
>
> I've attached a script for creating a cylinder packing and a couple
> snapshots that clearly shows the bias towards more larger particles near the
> crown of the cylinder. The bias is most easily observed if the range of
> particle sizes is relatively small (e.g. 0.4 to 1.0 or 0.5 to 1.0) but the
> bias still exists for broader ranges of particle sizes (0.2 to 1.0).
>
> Since this packing bias impacts upon the results of UCS simulations, I'm
> setting the importance of this bug to High.
>
>
>