**spiral_exact_test**,
a Fortran90 code which
calls spiral_exact(), which
samples a velocity vector field that satisfies the
continuity equation, and writes the nodes and velocities to a file,
suitable for display using GNUPLOT.

The computer code and data files made available on this web page are distributed under the MIT license.

spiral_exact, a Fortran90 code which samples a velocity vector field that satisfies the continuity equation, and writes the nodes and velocities to a file, suitable for display using GNUPLOT.

- spiral_exact_test.f90, calls all the tests.
- spiral_exact_test.sh, runs all the tests.
- spiral_exact_test.txt, the output file.

- spiral_exact.txt, the X, Y, U, V values.
- spiral_commands.txt, commands to GNUPLOT.
- spiral.png, the resulting plot.