Selecting the EBU Model

In the Physics Model Selection dialog, select a material model from the Material group. Typically, this will be Multi-Component Gas but Multi-Component Liquid is also acceptable.

Specify that your problem involves simulation of chemical reactions by selecting Reacting in the Reaction Regime group.

Specify whether your combustion is premixed, non-premixed or partially premixed by selecting the corresponding radio button in the Combustion group.

Select the Eddy Break-up option from the particular combustion group, as shown below.

Select Coupled Flow in the Flow group. This will also activate the Coupled Energy and Coupled Species models. The Physics Model Selection dialog will then look as shown below.

Select Segregated Flow in the Flow group. This will also activate the Segregated Species and Segregated Fluid Enthalpy models. The Physics Model Selection dialog will then look as shown below.

The remaining selections in this dialog depend on problem characteristics that are not specifically related to simulating combustion:

Select an appropriate model from the Equation of State group, depending on whether the fluid in your problem is a gas or a liquid.

Select the Implicit Unsteady or Steady option from the Time group, depending on the nature of your simulation.

Make an appropriate selection from the Viscous Regime group. In most cases this should be Turbulent as most of the available combustion models are only valid for turbulent flows.

If radiative heat transfer is important, select one of the options in the Radiation group.

Select Gravity from the Optional Physics models group if gravity forces significantly influence the solution, e.g. in fire simulations.

The choice of the desired EBU model variant is made within the Eddy Break-up node appearing in the simulation tree once this type of model is selected.