Initializing the Solution
The solution must be initialized to apply the initial conditions.
Once initial conditions have been set for each model in the simulation, the solution must be initialized, either automatically or manually, to apply the initial conditions. In general, you do not need to initialize manually as the automatic initialization is always run at the appropriate times.
In general, solution initialization requires no explicit action on your part. Before running or stepping, the solution is initialized automatically as required.
During solution initialization, each model that is activated in the simulation is instructed to allocate storage for its solution data. The data is then set according to the specified initial values for the model.
If storage exists and is initialized, it is not changed. To reinitialize an existing solution completely, first clear the solution.
If the mesh is changed in any way, then mesh variables such as volume are cleared and need reinitialized. This phenomenon occurs in rotor stator problems, for example, each time the rotor is stepped and a new interface intersection is calculated.
Initializing Manually
If you want to visualize the initialized solution, initialize manually.
To initialize, click the
(Initialize Solution) button in the toolbar or use the
menu item.
If the solution has already been initialized (manually or automatically), then this action has no effect. Executing this action after one or more iterations does not reinitialize the solution data. Any values that have been calculated for the solution variables to that point are untouched.
If you then change or add models to the simulation, an initialization sets the solution variables for the changed models.
You can use this feature with a vector displayer to display the direction of quantities on boundaries, even before you run the simulation.
Viewing the Initialized Solution
It can sometimes be informative to view the initialized solution to understand whether the initial data make sense.
Before scalars or vectors can be displayed, or reports generated, an initialized solution must exist. If it does not, no data is displayed. The omission of a scale on the scalar or vector bar of the scalar or vector display indicate the lack of data (rather than just a constant initial value).
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| Before Initialization | After Initialization |