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1. I need to be efficient
The multigroup (G), DOM (S
N
), cross section expansion (P
N
) method converges to an
analytic solution of the LBTE for G, N
→
infinity
and
no volume averaging is expected for fine spatial discretization (N
vox
→
infinity)
BUT
I need to be efficient
and since t~ G x M x N
vox
(x #iters. x order of legendre exp.),
even if I have the perfect finite differencing algorithm for solving the system of equations,
I need to reduce G, M, N
vox
!!!