Particle injection sources can specify the following characteristics about particle flow
through a face or region:
- Injection profile, which describes particle flow in terms of the overall mass of
particles or the specific number of particles over a time period.
- Size profile for the particles. Particles can be of a uniform size or can vary randomly
within a size range, vary with a linear or logarithmic distribution, or vary according to
a Rosin-Rammler distribution.
- Velocity of the particles, which you can define as an absolute velocity or a velocity
relative to the fluid flow at the injection location.
- Temperature of the particles for heat transfer simulations.
- Parcel size for the simulation. A parcel is a collection of particles that share the
same physical qualities. When the parcel size is relatively large, the simulation groups
more particles together, which can improve performance but sometimes reduce solution
accuracy.