Defining the Coal Particle Injector
The injector introduces coal particles into the reactive domain in a given direction, at a specified rate. The diameter of the coal particles is defined using the Roisin-Rammler method.
You specify the species mass fraction at the injector based on the proximate analysis. The proximate analysis gives the mass fractions of volatile matter, fixed carbon, ash, and moisture content (see Setting Material Properties). The mass fraction of raw coal is equal to the sum of volatile matter and fixed carbon. You are advised to set the value of char to 0.
To define the coal particle injector:
- Right-click the Injectors node and select New.
-
Rename the Injector 1 node to
Fuel and set the following properties:
Node Property Setting Fuel Lagrangian Phase Coal Type Part Injector Inputs - Select the node and set Method to Magnitude + Direction.
-
Expand the
node and set the following properties:
Node Property Setting Parcel Streams Value 5.0 Point Inclusion Probability Value 1 Injection Direction Value [1.0, 0.0] Mass Flow Rate Value 0.01162 kg/s As the tutorial simulation is 2D axisymmetric, you obtain this mass flow rate value that you specify by dividing the mass flow rate of the 360° combustor geometry by 2π.
Particle Diameter Method Rosin-Rammler Minimum 1.0E-5 m Maximum 5.0E-4 m Reference 2.0E-4 m Exponent 1.36 Particle Temperature Value 800 K Species Mass Fraction Value Click 
(Custom Editor) and set:
- RawCoal: 0.917
- Ash: 0.083
Velocity Magnitude Value 23.0 m/s - Save the simulation.