The implosion test [ http://www.astro.princeton.edu/~jstone/Athena/tests/implode/Implode.html ] causes Imogen's dimension split time evolution scheme to reveal the operator splitting error.
The higher the resolution used, the sooner the symmetry breaking becomes obvious (due to higher Re). Because the scheme is second order, the time to symmetry break should be tested and hopefully found to scale as 1/resolution^2.
The implosion test [ http://www.astro.princeton.edu/~jstone/Athena/tests/implode/Implode.html ] causes Imogen's dimension split time evolution scheme to reveal the operator splitting error.
The higher the resolution used, the sooner the symmetry breaking becomes obvious (due to higher Re). Because the scheme is second order, the time to symmetry break should be tested and hopefully found to scale as 1/resolution^2.