## 3.1. Setting the Initial Conditions in CFX-Pre

In CFX-Pre, you can set the initialization option for each solved variable to either the `Automatic` or `Automatic with Value`. Only solved (or principal) variables are initialized; if an initial field is required for other variables, it is derived from the solved variable initial fields.

You can set initial conditions on a per-domain basis (on the Initialization Tab in the CFX-Pre User's Guide for the domain when you check the Enable Initial Conditions toggle on the domain's Basic Settings tab), or globally (from the Global Initialization icon).

Global initialization options apply to all domains in the simulation. However, domain initialization will take precedence over global initialization for any domain in which it is specified.

For details on initialization, see Initialization in the CFX-Pre User's Guide.

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