### 6.8.1. Case 1: Transient Rotor Stator Single Stage

The transient rotor stator (TRS) single stage case is supported by the Time Transformation and Fourier Transformation models. Each model has different requirements:

- Time Transformation

  Figure 6.1: Typical Transient Rotor Stator Simulation using Time Transformation

  - You must select the transient rotor stator interface to which the transformation applies.

  - No additional parameters are needed if the 'Automatic' selection of domains is applied for either side of the interface.

- Fourier Transformation

  Figure 6.2: Typical Transient Rotor Stator Simulation using Fourier Transformation

  - For each component, you must model two instances of the domain, or group of domains, that is repeatable (see Fourier Transformation: Workflow Requirements).

  - You must select the transient rotor stator interface to which this transformation applies.

  - You must specify, for each domain connected to the rotor-stator interface: (a) which interface is to be used for sampling and (b) which interface is to be used for the application of phase-corrections.

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