0
TECHNICAL PAPERS

Control of Vortex Shedding From a Bluff Body Using Imposed Magnetic Field

[+] Author and Article Information
Sintu Singha, K. P. Sinhamahapatra

Department of Aerospace Engineering, Indian Institute of Technology, Kharagpur, India

S. K. Mukherjea

Department of Applied Mechanics, Bengal Engineering and Science University, Shibpur, Indiakalyanps@iitkgp.ac.in

J. Fluids Eng 129(5), 517-523 (Oct 24, 2006) (7 pages) doi:10.1115/1.2717616 History: Received September 09, 2005; Revised October 24, 2006

The two-dimensional incompressible laminar viscous flow of a conducting fluid past a square cylinder placed centrally in a channel subjected to an imposed transverse magnetic field has been simulated to study the effect of a magnetic field on vortex shedding from a bluff body at different Reynolds numbers varying from 50 to 250. The present staggered grid finite difference simulation shows that for a steady flow the separated zone behind the cylinder is reduced as the magnetic field strength is increased. For flows in the periodic vortex shedding and unsteady wake regime an imposed transverse magnetic field is found to have a considerable effect on the flow characteristics with marginal increase in Strouhal number and a marked drop in the unsteady lift amplitude indicating a reduction in the strength of the shed vortices. It has further been observed, that it is possible to completely eliminate the periodic vortex shedding at the higher Reynolds numbers and to establish a steady flow if a sufficiently strong magnetic field is imposed. The necessary strength of the magnetic field, however, depends on the flow Reynolds number and increases with the increase in Reynolds number. This paper describes the algorithm in detail and presents important results that show the effect of the magnetic field on the separated wake and on the periodic vortex shedding process.

FIGURES IN THIS ARTICLE
<>
Copyright © 2007 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

A sketch of the flow problem (B0 represents the uniform magnetic field)

Grahic Jump Location
Figure 2

The arrangement of the velocity components and pressure in a MAC cell

Grahic Jump Location
Figure 10

Variation of the average drag coefficient with the Hartmann number

Grahic Jump Location
Figure 9

Time history of the drag coefficient with respect to the nondimensional time (tV∕h) at Re=250; (a)H=0.0, (b)H=2.0, (c)H=5.0, and (d)H=7.0

Grahic Jump Location
Figure 8

Time history of the drag coefficient with respect to the nondimensional time (tV∕h) at Re=50; (a)H=0.0, (b)H=1.0, and (c)H=3.0

Grahic Jump Location
Figure 7

Temporal growth of lift coefficient with respect to the nondimensional time (tV∕h) at Re=250; (a)H=0.0, (b)H=2.0, (c)H=5.0, and (d)H=7.0

Grahic Jump Location
Figure 6

Temporal growth of lift coefficient with respect to the nondimensional time (tV∕h) at Re=50; (a)H=0.0, (b)H=1.0, and (c)H=3.0

Grahic Jump Location
Figure 5

Variation of (a) wake length and (b) Strouhal number with Hartmann number

Grahic Jump Location
Figure 4

Streamlines at Re=250: (a)H=0.0, (b)H=2.0, (c)H=5.0, and (d)H=7.0

Grahic Jump Location
Figure 3

Streamlines at Re=50: (a)H=0.0, (b)H=1.0, and (c)H=3.0

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In