Hi again,


A colleague just pointed out this article [1] where they use different discretization
schemes. I believe that your question is sufficiently broad (try "nonuniform finite
differences" as a search term) that this will have been addressed in other publications
too.

Happy Kwanting,

Joe

[1]: http://scitation.aip.org/content/aip/journal/jap/68/8/10.1063/1.346245