Choose the method for defining turbulence.

No fluctuations

Leaves the specified mean velocity unperturbed.

Intensity and Length Scale

Calculation of an isotropic field of velocity fluctuations that are superimposed on the specified mean velocity. A Turbulence Intensity node and a Turbulent Length Scale node will be added to the Values node.

Reynolds Stress and Length Scale

Calculation of an anisotropic field of velocity fluctuations that are superimposed on the specified mean velocity. Nodes for Turbulent Length Scale, UU Reynolds stress, VV Reynolds stress, WW Reynolds stress, UV Reynolds stress, UW Reynolds stress and VW Reynolds stress will be added to the Values node.