particle compaction in cylinder with different sizes

Hi Weimin,

The doc of randomDensePack suggests you may only get uniform (in number) size distribution with this function. So, it seems it does not suit your needs.

You will thus need to generate your packing "manually", following the classical procedure illustrated in examples/triax-tutorial/script-session1.py:

- creation of a gas like ("cloud") initial packing with "makeCloud" function
- isotropic compression of this packing until a solid state and a desired confining pressure

You will be able to specify a desired particle size distribution calling "makeCloud" function, see its "psdSizes" and "psdCumm" attributes.

Hi Jérôme,

                    Thanks for your quick answer.
                    I know "makeCloud" could solve the question, however "makeCloud" can just be used in cuboid (cube), my question is about cylinder.

If you're sure the cylindrical size does matter, you may try to generate a cuboid sample first with the required properties, then extract a representative cylindrical part in a second step ?

cylindrical "shape" instead of "size", sorry...

Thanks Jérôme Duriez, that solved my question.

Hi Jérôme,

    Any command in Yade that could extract a cylindrical part from a cuboid sample? I don't find the command.

I do not have any built-in command in mind, but it should not be too difficult "manually", again.

See for instance:

for b in O.bodies:
    if distanceBetweenBodyCenterAndCylinderAxis > cylinderRadius
        O.bodies.erase(b)

It's up to you to define and compute "distanceBetweenBodyCenterAndCylinderAxis" ;-)

Thank you Jérôme ,

Since there are some big size particles, I'm not sure this method could give good result(surface). I think drilling a cylinder core may be the best way, however, I don't know how to realize.

Thanks Klaus Thoeni, that solved my question.

Thanks Jérôme also.