Stability of electrically conducting liquid flow driven by a rotating magnetic dipole in a ring channel
| Autor: | I. Grants, Didzis Berenis |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Jet (fluid) Rotating magnetic field Mechanical Engineering Computational Mechanics Mechanics Condensed Matter Physics Ring (chemistry) 01 natural sciences Instability 010305 fluids & plasmas Magnetic field Physics::Fluid Dynamics Boundary layer Mechanics of Materials 0103 physical sciences Cylinder 010306 general physics Magnetic dipole |
| Zdroj: | Physics of Fluids. 32:044104 |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/5.0002094 |
| Popis: | The stability of electrically conducting liquid flow in a cylindrical ring channel is studied numerically. The flow is driven by a rotating magnetic dipole placed at the ring’s center. Depending on ring’s width, two distinct flow regimes are observed. In a narrow ring, the flow itself and its instability resemble the related rotating magnetic field driven flow in a cylinder. This changes in a wide ring when an intense radial jet develops on the midplane. Within this jet, the driving magnetic force is overwhelmed by inertial and viscous forces similar to how it occurs in the boundary layer flow. The instability develops as an azimuthally periodic wave-like deformation of this jet. Non-uniform driving force and the viscous boundary layer at the inner side wall are supposed as the main ingredients of the jet formation. |
| Databáze: | OpenAIRE |
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