Setting Up the Physics Models

Physics models define the primary variables of the simulation, including pressure, temperature, velocity, and what mathematical formulation is used to generate the solution.

The main phenomenon to solve for is the interaction of a granular Eulerian phase with a fluid Eulerian phase.

To select the physics models:

  1. For the physics continuum, Continua > Physics 1, select the following models in order:

    Group Box

    Model

    Enabled Models

    Two Dimensional (Pre-selected)

    Time

    Implicit Unsteady

    Material

    Multiphase

    Multiphase Interaction (Selected automatically)

    Multiphase Model

    Eulerian Multiphase (EMP)

    Gradients (Selected automatically)

    Viscous Regime

    Laminar

    Optional Models

    Gravity

    Granular Pressure

    Granular Temperature (Selected automatically)

    Granular Temperature Transport (Selected automatically)

  2. Click Close.
  3. To review the models, open the Physics 1 > Models node.


You now set the appropriate properties.

  1. Select Continua > Physics 1 > Models > Granular Pressure and set Frictional Stress Formulation to Schaeffer.
  2. Select the Granular Pressure > Schaeffer node and set the Angle of Internal Friction to 25.0.

Use second-order velocity convection.

  1. Select the Continua > Physics 1 > Models > Eulerian Multiphase (EMP) node and set the Volume Fraction Convection property to 2nd-order.
  2. Make sure that the Velocity Convection is 2nd-order.
  3. Save the simulation.