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Table 10 The number of iterations, execution times (in sec) and errors of C–N high-order finite difference method for Test problem 2, when \(\gamma =0.75\) and \(\nu =0.5\)

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

h/τIterationTimeMaximum errorAverage error
\(h=\tau =\frac{1}{14}\)3963.386.9462 × 10−31.9772 × 10−3
\(h=\tau =\frac{1}{18}\)45196.075.4142 × 10−31.5363 × 10−3
\(h=\tau =\frac{1}{22}\)41421.714.4652 × 10−31.2530 × 10−3
\(h=\tau =\frac{1}{30}\)371810.463.3150 × 10−39.1040 × 10−4