title: Patterned turbulence in liquid metal flow: computational reconstruction of the Hartmann experiment.
abstract: We present results of a numerical analysis of Hartmann's historical experiments on flows of mercury in pipes and ducts under the influence of magnetic fields. The computed critical parameters for the laminar-turbulent transition as well as the friction coefficients are in excellent agreement with Hartmann's data. The simulations provide a first detailed view of the flow structures that are experimentally inaccessible. Novel flow regimes with localized turbulent spots near the sidewalls parallel to the magnetic field and otherwise laminar flow are discovered. We finally suggest how these predictions can be tested in a transparent fluid using optical flow measurement.
authors.affiliation: Institute of Thermodynamics and Fluid Mechanics, Ilmenau University of Technology, PO Box 100565, 98684 Ilmenau, Germany.
authors.forename: Dmitry
authors.initials: D
authors.lastname: Krasnov
authors.forename: André
authors.initials: A
authors.lastname: Thess
authors.forename: Thomas
authors.initials: T
authors.lastname: Boeck
authors.forename: Yurong
authors.initials: Y
authors.lastname: Zhao
authors.forename: Oleg
authors.initials: O
authors.lastname: Zikanov