I'm making candied orange skin.Lie Trotter .
Just so happens that I am implementing LT as we speak. It's first-order. or 2nd order, go for Strang-Marchuk operator Splitting. Nice thing is splitting {diffusion, convection}, {potential, kinetic energy} and not {x,y}.
Wow! I didnie know you physicists knew BCH et al.
https://www.asc.tuwien.ac.at/~ewa/semin ... ag_Exl.pdf
I know it all mostly from quantum spin systems theory (earlier applications in physics are related to Brownian motions). What's different about physics and other hard sciences is that the Nature actually does the job of performing efficiently under strong random fluctuations. You guys just crash and crash, whenever the heat goes up.
What's BCH?