### 7.16.1. Ignition Delay Model

The ignition delay model is applicable when the principal combustion models would burn too early otherwise. It is available for combustion models for non-premixed combustion:

- Eddy Dissipation (EDM)

- Laminar Flamelet with PDF

The ignition delay model suppresses the reaction locally until the delay time has expired. Prior to that the reaction rate is set to zero (Eddy Dissipation) or the reaction progress is set to ‘fresh’ material (Flamelet).

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