Fig. 4

Velocity profiles for different values of \(\Pr \) with \(t = 1.0\), \(Gr = 5.0\), \(\omega = \pi /3\) (cosine), \(\omega = \pi /2\) (sine) and \({U_0} = 3.0\). a Primary velocity. b Secondary velocity
Velocity profiles for different values of \(\Pr \) with \(t = 1.0\), \(Gr = 5.0\), \(\omega = \pi /3\) (cosine), \(\omega = \pi /2\) (sine) and \({U_0} = 3.0\). a Primary velocity. b Secondary velocity