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Table 1 Optimal value of convergence control parameters versus different orders of approximation

From: Similarity analysis of MHD flow field and heat transfer of a second grade convection flow over an unsteady stretching sheet

Order of approximation

\(\boldsymbol{\hbar_{f}}\)

\(\boldsymbol{\hbar_{\theta}}\)

\(\boldsymbol{\varepsilon_{m}^{t}}\)

CPU time

2

−0.816110

−0.570098

7.37847 × 10−3

11.3260 seconds

3

−0.830974

−0.761688

1.30091 × 10−4

18.5925 seconds

4

−0.840993

−0.617020

1.99436 × 10−6

37.0145 seconds

5

−0.846134

−0.687839

3.39372 × 10−8

63.8482 seconds

6

−0.850443

−0.690781

5.04199 × 10−10

108.937 seconds

7

−0.858637

−0.731049

−1.1845 × 10−10

196.690 seconds