Defining Lagrangian Phases

A Lagrangian phase is used to define the solid particles in the simulation. The phase requires specific physics models and properties to characterize its behavior. In this case, the solid particles are glass beads, with the material properties defined manually.

To define the Lagrangian phase:

  1. Right-click the Lagrangian Multiphase > Lagrangian Phases node and select New > Free-stream Phase.
  2. Rename the phase to ORE
  3. Right-click the ORE > Models node and choose Select models

  4. In the ORE Model Selection dialog, select the following models, in order:
    Group Box Model
    Particle Type DEM Particles
    Optional Particle Forces Pressure Gradient Force (selected automatically)
    Particle Shape Spherical Particles
    Material Solid
    Equation of State Constant Density
    Optional Models Residence Time
  5. Click Close.

Now you can set an appropriate material for the Ore.

  1. Right-click the Rubber node and select Replace with...

  2. In the Replace Material dialog, expand the Material Databases > Standard > Solids node, select Glass (Glass Plate), and click OK.

Now define the material properties for the glass beads:

  1. Select the Material Properties > Density > Constant node and make sure that the Value property is set to 2500 kg/m^3.

  2. Select the Material Properties > Poisson's Ratio > Constant node and set Value to 0.3
  3. Select the Material Properties > Young’s Modulus > Constant node and set Value to 10 MPa

Define the physics conditions on the particle boundary using the surface material properties and interaction mode.

  1. Select the ORE > Boundary Conditions > Wall > Physics Conditions > Boundary properties > Solid > Al > Material Properties > Young’s Modulus > Constant node and set Value to 10 MPa.

  2. Select the ORE > Boundary Conditions > Wall > Physics Conditions > Mode node and set Active Mode to DEM mode.

  3. Save the simulation.