## PhoenixFD Turbulence |
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This component adds turbulence that can be controlled. The turbulence can be added in two different ways:

- as divergence free force (force with circular lines)
- as injector

The turbulence generator is based on fractal-like noise function, similar to the noise texture in Maya. This means, the final noise is a sum of several smooth random stages, with different scales and different amplitudes. The user can control the number of the random stages, their scale and their amplitude. The scale and amplitude of the first random stage are considered to be 1, and the scale and the amplitude of the last random stage are given by the user. All the scales and amplitudes of the intermediate stages are placed between these values. The final noise is normalized, i.e. even if you type 10 for the amplitude of the last stage, the whole result will be attenuated down to average value of 1.

Inject Mode injectMode - switches between inject and force mode

Size size - general scale multiplier

Fractal Depth fracDepth - the number of the additional stages (the real number is this parameter+1)

Last Stage Scale stageScale - the scale of the last stage, the scale of the first stage is 1, the intermediate stages are between 1 and this parameter

Last Stage Amplitude stageAmpl - the amplitude of the last stage, the amplitude of the first stage is 1, the intermediate stages are between 1 and this parameter

Random Seed randSeed - initial value for the random generator.

Speed speed- the speed of change of the noise

Multiplier multiplier - general amplitude multiplier.

Decay decay - how the multiplier decreases with the distance

- None - no decay
- Inv distance - decreases with the inverse distance
- Inv square - decreases with the inverse square of the distance
- Sphere - no decay in a sphere with radius 1 (in scene units with radius equal to the size) and no action outside the sphere

Drag Particles partPreview - affects the preview, when checked the trajectories of several particles are visualized

Locator Scale locatorScale - controls the locator size scale in the viewport

Locator Color locatorColor - controls the locator color in the viewport