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Table 2

Run time (in minutes) to convergence for the solution of Eq. (15) using Ns = 128, Νθ = 12, Nχ = 8, and Νν = 99, i.e., Ν ≃ 4.9 × 106 total unknowns.

Np 1 2 4 8 16 32 64 128
GMRES 1938 993 465 234 118 59.5 30.3
PGMRES 648 391 198 100 50.8 25.6 13.7 7.1

Notes. GMRES and PGMRES required 37 and 5 iterations to converge, respectively.

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