SIMPLEDDY Streamfunction, velocity, and vorticity for various eddy profiles. [V,PSI,ZETA]=SIMPLEDDY(R,RO,VO) returns the streamfunction PSI, azimuthal velocity V, and relative vorticity ZETA at radial locations R for the Rankine vortex. The eddy core radius is RO, in km, and at this radius the eddy currents achieve their maximum value of |VO| cm/s. The sign of VO gives the rotation sense of the eddy, positive for counterclockwise. PSI has units of km^2/s, V has units of cm/s, and ZETA of 1/s. RO and VO should either be scalars or an arrays of the same size as R. The output arrays will have size LENGTH(R) x N. _______________________________________________________________________ Eddy models SIMPLEDDY can also return profiles associated with various other types of model eddies. The following forms are available: SIMPLEDDY(R,RO,VO,'rankine') -- Rankine vortex [default] SIMPLEDDY(R,RO,VO,'gaussian') -- Gaussian vortex RO, VO, and the shape parameter ALPHA may then each be either scalars or arrays of the same length. _______________________________________________________________________ Eddy 'slices' SIMPLEDDY can also be used to return an eddy 'slice', that is, the eddy streamfunction, currents, and vorticity observed along a curve. CV=SIMPLEDDY(CX,RO,VO,...) where CX=X+iY is an array of locations on the complex plane, with units of kilometers, returns the complex-valued currents CV=U+iV due to an eddy located at the origin. [CV,PSI,ZETA]=SIMPLEDDY(CX,RO,VO,...) also returns the streamfunction and vorticity observed along this curve. _______________________________________________________________________ 'simpleddy --f' makes some sample figures. Usage: [v,psi,zeta]=simpleddy(r,RO,VO); [v,psi,zeta]=simpleddy(r,RO,VO,'gaussian'); __________________________________________________________________ This is part of JLAB --- type 'help jlab' for more information (C) 2015--2020 J.M. Lilly --- type 'help jlab_license' for details