On the analogy between streamlined magnetic and solid obstacles
dc.contributor.author | Votyakov, E. V. | en |
dc.contributor.author | Kassinos, Stavros C. | en |
dc.creator | Votyakov, E. V. | en |
dc.creator | Kassinos, Stavros C. | en |
dc.date.accessioned | 2019-05-06T12:24:48Z | |
dc.date.available | 2019-05-06T12:24:48Z | |
dc.date.issued | 2009 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48926 | |
dc.description.abstract | Analogies are elaborated in the qualitative description of two systems: the magnetohydrodynamic (MHD) flow moving through a region where an external local magnetic field (magnetic obstacle) is applied and the ordinary hydrodynamic flow around a solid obstacle. The former problem is of interest both practically and theoretically, and the latter one is a classical problem being well understood in ordinary hydrodynamics. The first analogy is the formation in the MHD flow of an impenetrable region-core of the magnetic obstacle-as the interaction parameter N, i.e., strength of the applied magnetic field, increases significantly. The core of the magnetic obstacle is streamlined both by the upstream flow and by the induced cross-stream electric currents, such as a foreign insulated insertion placed inside the ordinary hydrodynamic flow. In the core, closed streamlines of the mass flow resemble contour lines of electric potential, while closed streamlines of the electric current resemble contour lines of pressure. The second analogy is the breaking away of attached vortices from the recirculation pattern produced by the magnetic obstacle when the Reynolds number Re, i.e., velocity of the upstream flow, is larger than a critical value. This breaking away of vortices from the magnetic obstacle is similar to that occurring past a solid obstacle. Depending on the inlet and/or initial conditions, the observed vortex shedding can be either symmetric or asymmetric. © 2009 American Institute of Physics. | en |
dc.language.iso | eng | en |
dc.source | Physics of Fluids | en |
dc.subject | Electric potential | en |
dc.subject | Reynolds number | en |
dc.subject | Magnetic fields | en |
dc.subject | Fluid dynamics | en |
dc.subject | Hydrodynamics | en |
dc.subject | Vortex flow | en |
dc.subject | Vortex shedding | en |
dc.subject | Solid obstacles | en |
dc.subject | MHD flow | en |
dc.subject | Hydrodynamic flows | en |
dc.subject | Magnetic materials | en |
dc.subject | Magnetohydrodynamic flows | en |
dc.subject | Recirculations | en |
dc.subject | Applied magnetic fields | en |
dc.subject | Classical problems | en |
dc.subject | Contour line | en |
dc.subject | Contour measurement | en |
dc.subject | Critical value | en |
dc.subject | Electric current measurement | en |
dc.subject | Electric currents | en |
dc.subject | Electric power supplies to apparatus | en |
dc.subject | Initial conditions | en |
dc.subject | Interaction parameters | en |
dc.subject | Local magnetic field | en |
dc.subject | Magnetic obstacles | en |
dc.subject | Mass flow | en |
dc.subject | Upstream flow | en |
dc.title | On the analogy between streamlined magnetic and solid obstacles | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1063/1.3231833 | |
dc.description.volume | 21 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.contributor.orcid | Kassinos, Stavros C. [0000-0002-3501-3851] | |
dc.gnosis.orcid | 0000-0002-3501-3851 |
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