Particle Modeling

You can simulate Lagrangian particle physics in a simulation to analyze particle physics problems like the deposition of dirt in a fluid flow.

This workflow describes how to define all of the individual components required to create a simulation with Lagrangian particle physics.

  1. Activate particle modeling in the fluid physics of the simulation, and specify whether the particles have mass. For more information, see Defining Lagrangian Particles in Fluid Physics.
  2. Define a steady-state step or a transient step, and specify the coupling schemes for particle momentum and energy in the step. For steady-state simulations you can also define the post-steady-state particle time to specify how long particles will be tracked once the flow solution has converged. For more information, see Defining Particle Controls.
  3. Specify the locations where particles enter the fluid regions. For more information, see Specifying Particle Injection Sources.
  4. Specify how the inlets and mass flow split outlets in your model interact with the particles:
    • Reflection boundaries are locations where particles reflect off the inlet or outlet surface.
    • Termination boundaries are locations where particles leave the fluid regions.
    • Mixed boundaries are locations where a portion of particles reflect or terminate. The proportion of reflection and termination at mixed boundaries depends on the deposition model you specify.
    For more information, see Defining a Particle Boundary.
  5. After you complete the remaining modeling and scenario tasks, you can request field and history output about the particles and the boundaries. For more information, see Defining Output Requests.

When the simulation results are available, you can plot contours of the selected output to review the particle and boundary behavior.