The strength of the turbulence.
If this value is set to 0% random velocities will be generated for each individual particle (behavior in Cinema 4D versions prior to R11.5). If any other value is entered a three-dimensional noise will be applied that will affect the particles. The Scaling value simply defines the size of the noise. The smaller the noise the more randomly the particles will be dispersed; the larger the noise the more homogenous the particle flows will be.
If the noise should change over time enter a value not equal to 0. The irregular noise will generate particle streams that will change homogeneously. Lower values will cause the noise to change more slowly; larger values will cause the noise to change more quickly. A value of 0 will cause the noise to be static, resulting in a constant stream of particles in a given direction, as shown in the image below:
Here you can define how a particle modifier should affect dynamic objects (these settings have no effect on particles):
Note that when using the Aerodynamic Wind option, its effect will differ depending on the object over which it flows: