How can I assign material property to meshes??

Submitted by fabregas04 on Sun, 10/08/2017 - 15:00

Hi guys!

I'm planning to assign material properties ( density, charge, youngs modulus etc.) to the meshes so that meshes can interact with the particle.

Eventually, I want my meshes to have Coulomb force and contact force with the particles.

1. If I use 'fix cad all mesh/surface file mesh.stl type 1' then imported mesh have the material property of atom type 1?

2. And if I want to assign material property different from the particle, then how can I assign it?

3. If I want to include the Coulomb force then should I use different 'fix wall/*' command other than ' fix meshwalls all wall/gran model hertz tangential history mesh n_meshes 1 meshes cad' ?

Sincerely, Lee.

Forums:

afcsli | Mon, 10/09/2017 - 15:23

Hi Lee,

1&2. you should define an additional material type for the mesh and use "fix cad all mesh/surface file mesh.stl type 2".
3. Coulomb friction is already included in this fix, So based on the material properties you have defined for particles and mesh it calculates the coulomb force as well.

Regards,
Afsaneh

fabregas04 | Tue, 10/10/2017 - 07:20

1&2 then, is it okay that if I didn't create any single atom in atom type 2 but assign material properties to atom type 2 and to the meshes? or should I create at least one atom to assign material properties?

3. I mean not the Coulomb friction, I meant electrostatic force. It seems like it doesn't work with the fix wall/gran etc.

afcsli | Thu, 10/12/2017 - 11:53

1&2. If I have understood your question correctly, Yes that's ok. you can allocate a material type just to mesh without any particles of that type.
3. According to my knowledge Electrostatic forces on mesh (for non-contact forces) is not released in public version yet.

regards,
Afsaneh