foxes.utils.ustar2ti(ustar, ws, max_ti=None)[source] Convert friction velocity (u*) to turbulence intensity (TI). Parameters¶ ustarnumpy.ndarrayFriction velocity. wsnumpy.ndarrayWind speed. max_tifloat, optionalUpper limit of the computed TI values. Returns¶ tinumpy.ndarrayTurbulence intensity.