Liquid metal MHD flows in circular ducts at intermediate hartmann numbers and interaction parameters.

Magnetohydrodynamic (MHD) flows in circular ducts in nonuniform magnetic fields are studied with reference to liquid metal blankets and divertors of fusion reactors. Flows in small and medium size reactors are characterized by moderate and low values of the Hartmann number ({approx}50-2000) and the interaction parameter ({approx}0.1-1000). The validity of the high-Hartmann number flow model for the intermediate range is discussed and the results of theoretical and experimental investigations are presented.