Creator Tree-Bulk Material

The Creator Tree-Bulk Material allows you to add bulk material and bulk material particle shapes to a model and define the interactions.

Every particle or piece of geometry in a model is made of a specific material. All materials, as well as their interactions, must be defined in the Bulk Material or Equipment Material tree. Materials can be created directly in the simulation or imported from the Materials Database. The model contains all of the materials defined in the Materials section.

Adding Bulk Material to a model

A Bulk Material contains the particle bulk material properties, particle shape, and size distribution.

  1. Right-click and select Add Bulk Material or use the icon to add the material. You can rename the material appropriately.

  2. Specify the Poisson's Ratio, Shear Modulus (or Young's Modulus), Solids Density, and Work Function (if applicable).

  3. Optionally, you can copy to create a duplicate of the currently selected material. To remove a material from a model, select the material and then click the icon.

Defining Interactions

Interactions define how materials behave when they come into contact with one another. All materials used in your model must have interactions defined, including the interaction that occurs when a material comes into contact with itself, such as when two particles of the same material collide.

To define an interaction between two materials:

  1. Select the first material from the list of Bulk Materials in the Creator Tree.

  2. Click the + icon in the Interaction section.

  3. From the Select Material dialog box, select the second material.

  4. Specify values for the Coefficient of Restitution, Coefficient of Static Friction, and Coefficient of Rolling Friction into the relevant fields.

Interactions must be defined for every combination of Bulk Materials and their interactions with other Bulk Materials and Equipment Materials.

The Bulk Material section of the Creator Tree is where the user can select the bulk material required for a simulation, define the material inlet region, and specify mass flow rate into the system. Bulk materials, as with Equipment materials, are selected from the EDEM Material Model database.

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