Controlling TurbulenceFD’s wind and buoyancy direction parameters with default vector input is not very intuitive. I made more artist friendly tool with Xpresso and Python so you can rotate spline object to aim direction for wind and buoyancy.

import c4d
from c4d.utils import SplineHelp

def main():
    global Vector # Output variable
    sh = SplineHelp() # Get a new spline help object
    sh.InitSpline(Spline) # Initialize spline help with object
    Vector = sh.GetNormal(0) # Get a normal vector

ar_xpresso_tfd_direction_tool.c4d v1.0.0 (2023.1.3)