Selecting Physics Models
The standard EBU version of the Eddy Break-Up model is used to represent the combustion reactions that occur within the coal combustor, since the reaction rates are limited by the rate at which turbulence mixes the reactants and heat into the flame zone.
To select the physics models:
- Rename the node to Coal Combustion.
- For models in the Coal Combustion continuum:
- In the Enabled Models group box, deselect Two Dimensional.
- Select the following models in order:
Group Box Model Space Axisymmetric Time Steady Material Multi-Component Gas Reaction Regime Reacting Reacting Flow Models Reacting Species Transport Reacting Species Models Eddy Break-Up Flow Segregated Flow (selected automatically) Gradients (selected automatically) Segregated Species (selected automatically) Segregated Fluid Enthalpy (selected automatically) Equation of State Ideal Gas Viscous Regime Turbulent Reynolds-Averaged Navier-Stokes (selected automatically) Reynolds-Averaged Turbulence K-Epsilon Turbulence Realizable K-Epsilon Two-Layer (selected automatically) Wall Distance (selected automatically) Two-Layer All y+ Wall Treatment (selected automatically) Optional Models Axisymmetric Swirl Lagrangian Multiphase Radiation Surface Materials (selected automatically)
Radiation Participating Media Radiation (DOM) Radiation Spectrum (Participating) Gray Thermal Radiation - Click Close.
- Select the node and set the following properties:
Property Setting Reaction Control Standard EBU Source Term Limiting Activate - Right-click the node and select Select Mixture Components.
- In the Select Mixture Components dialog, select the following:
- CO (Carbon Monoxide)
- CO2 (Carbon Dioxide)
- CoalVolatile (Coal Volatile)
- H2 (Hydrogen)
- H2O (Water)
- N2 (Nitrogen)
- O2 (Oxygen)
- SO2 (Sulphur Dioxide)
- Click Apply, then click Close.
- Save the simulation.