**5. Conclusions**

The unsteady rotating flow of a uniformly conducting incompressible fourth-grade fluid between two parallel infinite plates in the presence of a magnetic field is modeled. The steady rotating flow of the non-Newtonian fluid subject to a uniform transverse magnetic field is studied. The governing non-linear equations are solved numerically. The numerical results of the non-Newtonian fluid are compared with those of a Newtonian fluid. The major findings of the present works can be summarized as follows:


It is noted that the flow behaviour depends strongly on the choice of the parameters.
