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Table 11 The number of iterations, execution times (in sec) and errors of C–N high-order finite difference method for Test problem 2, when \(\gamma =0.5\) and \(\nu =0.25\)

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

h/τIterationTimeMaximum errorAverage error
\(h=\tau =\frac{1}{10}\)3815.681.7920 × 10−25.3176 × 10−3
\(h=\tau =\frac{1}{18}\)44201.849.6753 × 10−32.7719 × 10−3
\(h=\tau =\frac{1}{22}\)38416.857.9215 × 10−32.2376 × 10−3
\(h=\tau =\frac{1}{30}\)371766.265.8344 × 10−31.6210 × 10−3