The article is a continuation of previous works in which general equations of magnetohydrodynamics were used for derivation of expressions describing the motion of a conductive fluid in a narrow channel of annular cross section with a rotating magnetic field. This system is numerically integrated in the present paper and results are given showing the distribution of velocity, magnetic field and pressure in the channel as well as indices describing energy transformation as a function of geometric parameters, the magnetic Reynolds number and the Alfven number. (Author).

Research concerns an incompressible, viscous, electrically conducting fluid in steady flow in a long cylindrical channel to which an external torque is applied, making the fluid rotate. This rotation diffuses upstream and downstream due to viscosity; it is also carried downstream by convection. If, in addition, there is a uniform applied magnetic field in the channel, motion of the conducting fluid across the magnetic lines is retarded. The problem considered herein to determine how the rotational velocity was distributed in the channel, and how the applied magnetic field was distorted by this motion. (Author).