All integrable Hamiltonian systems are alike, while each nonintegrable one is nonintegrable in its own way
vortex shedding (POV-Ray)
Vortex shedding around a half-cylinder rendered by POV-Ray.
Here the POV-Ray arrow layer is produced from Gerris (GFS) output with the command
vfplot \
--verbose \
--width 4in \
--margin 2/2/0.2 \
--scale 2e-4 \
--iterations 250/2 \
--symbol triangle \
--pen 0 \
--fill 0 \
--domain domain.geojson \
--output-format povray \
--output vfplot.inc \
gfs/frame-2.0.gfs
producing a file vfplot.inc
(for notes on the
format, see here)
to be included in in a wrapper script vfplot.pov
.
As in the PostScript version
of this plot, the vorticity is extracted from the GFS file
to make a GMT grd file vort.grd
but now this is
used to make a PNG of the vorticity and that is used in the
wrapper script to colour the symbols in POV-Ray.
Download the plot as pdf, high resolution png or view the GitLab sources.