hydromagnetic couette flow of class-ii and heat transfer through a porous medium in a rotating system with hall effects

steady hydromagnetic couette flow of class-ii of a viscous, incompressible and electrically conducting fluid through a porous medium in a rotating system taking hall current into account is investigated. heat transfer characteristics of the fluid flow are considered taking viscous and joule dissipations into account. it is noticed that there exists flow separation at the moving plate in the secondary flow direction on increasing either rotation parameter $k^2$ when hall current parameter $m = 0.5$ or $m$ when $k^2 = 7$. also there exists flow separation at the moving plate in the secondary flow direction on increasing either magnetic parameter $m^2$ for every value of porosity parameter $k_1$ or $k_1$ when $m^2 = 15$.