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Table 9 The number of iterations, execution times (in sec) and errors of C–N high-order finite difference method for Test problem 1, when \(\gamma =0.75\)

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

h/τIterationTimeMaximum errorAverage error
\(h=\tau =\frac{1}{10}\)5319.233.9473 × 10−32.2815 × 10−3
\(h=\tau =\frac{1}{14}\)4871.193.0133 × 10−31.6230 × 10−3
\(h=\tau =\frac{1}{18}\)52220.022.4059 × 10−31.2567 × 10−3
\(h=\tau =\frac{1}{22}\)57603.562.0087 × 10−31.0258 × 10−3
\(h=\tau =\frac{1}{30}\)652571.451.5053 × 10−37.5067 × 10−4