Script for the Convection-Reaction-Diffusion equation in 3D
Add a file for the Convection-Reaction-Diffusion equation in 3D.
The discretization is similar to the 2D case, but we use a
different time-stepping. In particular, we use the Semi-Implicit
Backward Differentiation Formula, which is a multistep method.
To "bootstrap" the method, we use an IMEX method based on
Forward and Backward Euler. Since the "bootstrapping" method
can be an order less "fast" than multistep method, and
Forward-Backward Euler is an order 1 method, we get time
convergence of order two.
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