Som basic questions

Hello,

2010/1/8 abasak <email address hidden>

> New question #96704 on ESyS-Particle:
> https://answers.launchpad.net/esys-particle/+question/96704
>
> Hello,
>
> I have just looked through the ESsys code and it looks promising for my
> purpose. However, before I take the plunge, I would like to know if
>
> (1) geometries produced by gmsh, using triangular meshes are used at it is
> in the code? I mean, does the code handle collisions between spherical balls
> and the triangular facets or does it convert the triangular mesh into a
> collection of spherical particles?
>
> ESyS has a special "bodies" called mesh. Geometry, produced by GMSH,
imports directly to simulation with these mesh help.

(2) Is it possible to give a prescribed motion to any body in a simulation?
>
> You can change positions of spheres and meshes "by hands" on each step.

> (3) is it possible to do FEM simulations, for eg to get the stresses due to
> impact of the spherical balls?
>
> Thanks
> Abhishek
>
> --
> You received this question notification because you are an answer
> contact for ESyS-Particle.
>

Hello Anton,

Thanks for your answer!......so what you are saying that bodies produced by gmsh need not be "packed" by spheres?.....and that sphere to triangle collision detection is implemented?

Also, can you confirm if the spheres are modelled as 3D objects? that is Ix,Iy and IZ are all considered..or are they "points" rather than 3D spheres...

Thanks
Abhishek

Sorry, I do not clearly understand what you mean. You can read a good tutorial on using GMSH with ESyS:
https://answers.launchpad.net/esys-particle/+faq/683
https://twiki.esscc.uq.edu.au/pub/ESSCC/DocumentationAndPresentations/Gmsh_tutorial_for_ESyS-Particle.pdf

Geometry, produced by GMSH, imports like triangles into the simulation. There is a collision mechanism in ESyS between triangles and spheres.

AFAIK, spheres in ESyS are complete 3D bodies with rotation and inertia.

Thanks!..you have cleared by doubts!