[CFD2DXY]

Hello everybody,

I am new to this forum and a doctoral student.
I am currently using Star CCM+ to simulate fluids flowing down a wire. This works very well.

I use a field function on the inlet to set the speed of the fluid, which then flows down the wire.
Using another field function, I now generate a forced disturbance (frequency) in the flow (sinus function). Using post-processing (FFT) I also find the frequency of the disturbance at the inlet.

Now to my question: I have seen in different publications that also a white noise was simulated. For this I must add to my above mentioned field function for the velocity an another field function, instead of the forced interference frequency (see picture). For this I must add to my above mentioned field function for the velocity another, instead of the forced interference frequency (see attached Thumbnails). How should I implement the lower equation as a field function ?

I would be super grateful if someone could help me .

best regards

CFD2DXY