Table 1 Skin friction coefficient for different values of fractional parameter \(\alpha\) when \({M}_{g}\) = 1, \({M}_{p}\) = 2, \(\beta\) = 2.4.

From: Fractional analysis of unsteady squeezing flow of Casson fluid via homotopy perturbation method

Parameter

\(\alpha\)

\(\left(1+\frac{1}{\beta }\right)\mathcal{U} {^{\prime}}{^{\prime}}(1)\)

\({S}_{q}\) = − 0.3

3.2

\(-5.264\)

3.4

\(-5.093\)

3.6

\(-4.942\)

3.8

\(-4.814\)

3.95

\(-4.534\)

\({S}_{q}\) = 0.3

3.2

\(-5.545\)

3.4

\(-5.363\)

3.6

\(-5.195\)

3.8

\(-5.047\)

3.95

\(-4.948\)