yade-users team mailing list archive

[Jerome Duriez <duriez@xxxxxxxxxxxxxxx>]

> I want to generate particles of size 2 mm. with a certain dispersion of 10 %.
>
> I input the information to the TriaxialTest, density, modulate of elasticity, angle of friction, but the spheres that are generated do not agree what I wish.
>
> My question is, I can control somehow the size of the spheres that the program generates to travez of an algorithm. If the response is positive, since place?
>
>
>   
No problem. I don't work in fact with yade-0.12 but in my version of the 
TriaxialTest.cpp I have a variable "importFileName"  which would help 
you. These "import files" are text files in which are stored all the 
informations about the spheres of your numerical sample, precisely and 
respectively : the X,Y and Z coordinates of the centers of the spheres, 
then their radius.
The best for you is so to create yourself your own import file 
corresponding to what you want, put it in YADE/bin (I think) and type 
its name in "importFileName". Otherwise (if this importFileName is not 
defined by the user) this list of informations is generated by the 
Preprocessor, via a "GenerateCloud" method, and it is not surprising 
that it doesn't generate what you want.

For all that, see these lines at the end of the "generate" method of 
TriaxialTest (and at the end for the definition of the GenerateCloud) :
NB : a BasicSphere is couple of a three real vector : the coordinates of 
the center and a real : the radius : ( (X,Y,Z),R)

   vector<BasicSphere> sphere_list;
   if(importFilename!="") 
sphere_list=Shop::loadSpheresFromFile(importFilename,lowerCorner,upperCorner);
   else message+=GenerateCloud(sphere_list, lowerCorner, upperCorner, 
numberOfGrains, 0.3, 0.75);
  
   vector<BasicSphere>::iterator it = sphere_list.begin();
   vector<BasicSphere>::iterator it_end = sphere_list.end();
          
   for (;it!=it_end; ++it)
   {
       cerr << "sphere (" << it->first << " " << it->second << ")"<<endl;
       createSphere(body,it->first,it->second,false,true);
       rootBody->bodies->insert(body);
   }   

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