Creo Flow Analysis > Preprocessing > Defining Physics > Streamline > Definitions
  
Definitions
Direction—Provides directional options for tracking streamlines released at a boundary.
Number of Particles—Number of particles released at a boundary.
Random Release—Controls the location of the release of the streamline at a boundary.
Release Particles—Activates the release of streamlines at a boundary.
Release Position—Controls the method for releasing streamlines at a boundary.