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Table 8 The number of iterations, execution times (in sec) and errors of C–N high-order finite difference method for Test problem 1, when \(\gamma =0.1\)

From: High-order compact scheme for the two-dimensional fractional Rayleigh–Stokes problem for a heated generalized second-grade fluid

h/τIterationTimeMaximum errorAverage error
\(h=\tau =\frac{1}{10}\)5218.425.7562 × 10−32.7256 × 10−3
\(h=\tau =\frac{1}{18}\)49216.684.6550 × 10−32.1446 × 10−3
\(h=\tau =\frac{1}{22}\)56601.964.0416 × 10−31.8512 × 10−3
\(h=\tau =\frac{1}{30}\)632577.193.0746 × 10−31.4077 × 10−3