spiral_exact_test, a C++ 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 C++ code which computes a velocity vector field that satisfies the continuity equation, writing the data to a file that can be plotted by gnuplot().
Sample data was generated with N = 20 and C = 0.45 and plotted with GNUPLOT: