# SRF

Source: https://help.sim-flow.com/documentation/panels/srf
Last updated: 2026-10-14

## Single Rotating Frame (SRF)

![srf](https://help.sim-flow.com/documentation/panels/images/srf/srf.png)

The Single Rotating Frame (SRF) model simulates flow in a rotating coordinate frame of reference that is related to rotating machinery. The angular velocity is specified in terms of a global axis and expressed in revolutions-per-minute [rpm].

**Inputs:**

- **Origin [m]** - reference point
- **Axis** - axis of rotation
- **RPM** - angular velocity in revolutions-per-minute