4.2.2.2. List of Symbols

BEM	blade-element momentum
CFD	computational fluid dynamics
DOE	U.S. Department of Energy
\(F_v\)	core radius factor
\(t\)	time
FVW	free vortex wake
\(N\)	number of rotor revolutions before wake cutoff condition
\(\vec{r}\)	vector between point of interest and vortex segment
\(\vec{r}(\psi,\zeta)\)	position vector of Lagrangian markers
\(r_c\)	core radius
\(r_{c0}\)	initial core radius
OLAF	cOnvecting LAgrangian Filaments
\(\alpha\)	numerical constant \(=1.25643\)
\(\Gamma\)	circulation strength
\(\delta\)	measure of viscous diffusion
\(\epsilon\)	measure of strain
\(\Delta \psi\)	step size for blade rotation
\(\Omega\)	rotational speed of wind turbine
\(\zeta\)	vortex wake age
\(\zeta_0\)	vortex wake age offset
\(\nu\)	kinematic viscosity
\(\psi\)	azimuth blade position