Application of magnetohydrodynamics for suppressing the fluctuations in the unsteady flow around two side-by-side circular obstacles

. In this paper, the vortex shedding and flow structure around two circular obstacles in a side-by-side arrangement are controlled numerically by means of a magnetic field. The governing equations consisting of continuity and momentum equations are solved by the SIMPLE algorithm under unsteady condi...

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Bibliographic Details
Published in:European physical journal plus 2016-12, Vol.131 (12), p.423, Article 423
Main Authors: Rashidi, S., Bovand, M., Abolfazli Esfahani, J.
Format: Article
Language:English
Subjects:
Aerodynamic coefficients
Algorithms
Applied and Technical Physics
Atomic
Barriers
Complex Systems
Condensed Matter Physics
Drag coefficients
Field strength
Fluid flow
Magnetic fields
Magnetohydrodynamics
Mathematical and Computational Physics
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Regular Article
Reynolds number
Theoretical
Unsteady flow
Vortex shedding
Vorticity
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Summary:. In this paper, the vortex shedding and flow structure around two circular obstacles in a side-by-side arrangement are controlled numerically by means of a magnetic field. The governing equations consisting of continuity and momentum equations are solved by the SIMPLE algorithm under unsteady conditions. Series of simulations were performed for a range of spacing ratios ( 1 . 6 < T / D < 4 ) , Stuart numbers ( 0 < S t u < 5 ) and a fixed value of Reynolds number ( R e = 100 ) . The effects of the magnetic field strength and spacing ratios on the drag and lift coefficients, streamlines and vorticity contours are investigated in details. It was found that the drag coefficient has a minimum value at the critical steadiness Stuart number. Moreover, there is a 76.5% decrement in the lift coefficient when the spacing ratio grows from 1.5 to 4 for S t u = 0 .
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/i2016-16423-9