23.3.3 Point Properties for Single Injections

For a single injection, you will define the following initial conditions for the particle stream under the Point Properties heading (in the Set Injection Properties dialog box):

• position

  Set the $x$, $y$, and $z$ positions of the injected stream along the Cartesian axes of the problem geometry in the X-, Y-, and Z-Position fields. ( Z-Position will appear only for 3D problems.)

• velocity

  Set the $x$, $y$, and $z$ components of the stream's initial velocity in the X-, Y-, and Z-Velocity fields. ( Z-Velocity will appear only for 3D problems.)

• diameter

  Set the initial diameter of the injected particle stream in the Diameter field.

• temperature

  Set the initial (absolute) temperature of the injected particle stream in the Temperature field.

• mass flow rate

  For coupled phase calculations (see Section  23.6), set the mass of particles per unit time that follows the trajectory defined by the injection in the Flow Rate field. Note that in axisymmetric problems the mass flow rate is defined per $2\pi$ radians and in 2D problems per unit meter depth (regardless of the reference value for length).

• duration of injection

  For unsteady particle tracking (see Section  23.2.2), set the starting and ending time for the injection in the Start Time and Stop Time fields. When In-Cylinder mesh motion is enabled, set the starting and ending crank angles for the injection in the Start Crank Angle and Stop Crank Angle fields.

For the massless particle type, you will only need to define the position of the injection. The particle injection velocity is set by the solver equal to the velocity of the continuous phase at the injection point.