### 36.7.1. Type

The following options are available under Type:

- Rotor Stator

  This option is available for the Time Transformation and Fourier Transformation methods, and can be applied only when the disturbance originates from a domain interface that uses the Transient Rotor Stator frame change/mixing model.

- Rotational Flow Boundary

  Use this option to characterize a disturbance that originates from a boundary condition (for example, an inlet or outlet boundary condition that is specified using one or more CEL expressions that depend on space and time).

For details, see Transient Blade Row Models Details View.

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