Print Email Facebook Twitter Effects of electromagnetic forcing on self-sustained jet oscillations Title Effects of electromagnetic forcing on self-sustained jet oscillations Author Kalter, R. Tummers, M.J. Kenjeres, S. Righolt, B.W. Kleijn, C.R. Faculty Applied Sciences Department ChemE/Chemical Engineering Date 2014-06-06 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-south-north 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. A critical Stuart number N c was found. For N < N c , the jet oscillates with a constant Strouhal number St, independent of the Reynolds number Re. For N > N c and an oscillation enhancing up-down-up configuration of the Lorentz force, St grows with N as St ?N??? . In contrast, for N > N c and an oscillation suppressing down-up-down configuration of the Lorentz force, all jet oscillations are suppressed. Subject Lorentz groupmagnetsmagnetic fieldsvelocimetryvelocity measurement To reference this document use: http://resolver.tudelft.nl/uuid:4b061a61-02e0-4f40-8097-1dafdb95d850 DOI https://doi.org/10.1063/1.4880897 Publisher American Insitute of Physics ISSN 1070-6631 Source http://scitation.aip.org/content/aip/journal/pof2/26/6/10.1063/1.4880897 Source Physics of Fluids, 26, 2014 Part of collection Institutional Repository Document type journal article Rights © 2014 AIP Publishing Files PDF Kalter_2014.pdf 927.82 KB Close viewer /islandora/object/uuid:4b061a61-02e0-4f40-8097-1dafdb95d850/datastream/OBJ/view