### 9.17.4. Advanced Combustion Controls

Global Dynamic Model Control for combustion takes effect when the EDM product limiter is enabled by setting Eddy Dissipation Model Coefficient B to positive. Global Dynamic Model Control for combustion disables the product limiter for the EDM model until after the Transition Iteration. This allows the specification of no products in the domain as a valid initial condition. Global Dynamic Model Control is always selected for combustion, regardless of the choice selected in CFX-Pre, as it provides the most appropriate solver behavior.

You can disable this feature by setting the Transition Iteration to `0` on the Advanced Options of the Solver Control form in CFX-Pre. Select Combustion Control and enter a number for the transition iteration.

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