# rotationSpeed

> The speed at which particles are propelled around a vortex.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public ParticleSystem.MinMaxCurve rotationSpeed { get; set; }
```

### Remarks

Set in conjunction with [ParticleSystemForceField.rotationAttraction](/engine/6000.5/script-reference/unityengine/particlesystemforcefield/rotationattraction.md) to create a vortex effect within the volume of the Force Field. Additional Resources: [ParticleSystemForceField](/engine/6000.5/script-reference/unityengine/particlesystemforcefield.md).