ANSYS Fluent can track the motion of particles through a fluid using the Discrete Phase Model (DPM).  In the most basic approach to implementing particles in a CFD analysis the user specifies:  injection location, speed, mass flow rate, particle size & material.

Particles can interact with boundary walls with options: reflection, escape, trapping, sliding, or forming a film.

DPM offers an impressive range of advanced capabilities, including:

• Random effects of small-scale turbulent eddies
• Particle size distribution
• Two-way interaction where particles influence flow
• Particle-particle interaction for dense populations
• Particle heat transfer and vaporization/boiling of droplets & bubbles

“Particle Tracks” is the primary tool to postprocess particle behavior.  In addition to creating a graphical display of particle paths, this tool offers a powerful option to quantify particle behavior.  From the Particle Tracks menu, activate Report Type -> Summary, and Report To -> Console.  The text interface will report statistics for individual boundaries where particles exit the system, including Particle Count, Elapsed Time and Mass Flow.