Table 1 Values of Coefficient of Skin friction (\(Cf\)) for diverse values of \({\text{Re}} ,\lambda\) and \(\lambda_{1}\) when \(\in \; = \; \in_{1} \; = \;Nb\; = \;Nt\; = \;\gamma \; = \;0.1,\;Le\; = \;\Pr \; = \;1.2\).

From: Double-diffusive Hamel–Jeffrey flow of nanofluid in a convergent/divergent permeable medium under zero mass flux

\({\text{Re}}\)

\(\lambda\)

\(\lambda_{1}\)

\(Cf\) (α = 18°)

\(Cf\) (α = − 18°)

1.1

0.1

0.9

− 1.7569

− 1.7590

1.2

  

− 1.6104

− 1.6125

1.3

  

− 1.4865

− 1.4886

1.4

  

− 1.3802

− 1.3823

0.4

0.1

0.9

− 4.8334

− 4.8355

 

0.3

 

− 4.8440

− 4.8248

 

0.5

 

− 4.8546

− 4.8142

 

0.7

 

− 4.8652

− 4.8036

0.4

0.5

0.1

− 4.8039

− 4.8650

  

0.4

− 4.8229

− 4.8460

  

0.7

− 4.8419

− 4.8269

  

0.9

− 4.8546

− 4.8142