Effects of electromagnetic forcing on self-sustained jet oscillations. Kalter, R., Tummers, M., Kenjere?, S., Righolt, B., & Kleijn, C. Physics of Fluids, 2014. abstract bibtex The influence of electromagnetic forcing on self-sustained oscillations of a jet issuing from a submerged nozzle into a thin vertical cavity (width W much larger than thickness T) has been studied using particle image velocimetry. A permanent Lorentz force is produced by applying an electrical current across the width of the cavity in conjunction with a magnetic field from three permanent magnets across its thickness. As a working fluid a saline solution is used. The magnetic field is in the north-southnorth configuration, such that the Lorentz force can be applied in an up-down-up configuration or in a down-up-down configuration by switching the direction of the electrical current.Acritical Stuart numberNc was found. ForN Nc and an oscillation enhancing up-down-up configuration of the Lorentz force, St grows with N as St ? ?N. In contrast, for N > Nc and an oscillation suppressing down-up-down configuration of the Lorentz force, all jet oscillations are suppressed. ? 2014 AIP Publishing LLC.
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title = {Effects of electromagnetic forcing on self-sustained jet oscillations},
type = {article},
year = {2014},
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abstract = {The influence of electromagnetic forcing on self-sustained oscillations of a jet issuing from a submerged nozzle into a thin vertical cavity (width W much larger than thickness T) has been studied using particle image velocimetry. A permanent Lorentz force is produced by applying an electrical current across the width of the cavity in conjunction with a magnetic field from three permanent magnets across its thickness. As a working fluid a saline solution is used. The magnetic field is in the north-southnorth configuration, such that the Lorentz force can be applied in an up-down-up configuration or in a down-up-down configuration by switching the direction of the electrical current.Acritical Stuart numberNc was found. ForN<Nc, the jet oscillates with a constant Strouhal number St, independent of the Reynolds number Re. For N > Nc and an oscillation enhancing up-down-up configuration of the Lorentz force, St grows with N as St ? ?N. In contrast, for N > Nc and an oscillation suppressing down-up-down configuration of the Lorentz force, all jet oscillations are suppressed. ? 2014 AIP Publishing LLC.},
bibtype = {article},
author = {Kalter, R. and Tummers, M.J. and Kenjere?, S. and Righolt, B.W. and Kleijn, C.R.},
journal = {Physics of Fluids},
number = {6}
}
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