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Applied Mathematics Research eXpress (2005) Vol. 2005 : article ID 229, 248 pages, doi:10.1155/AMRX.2005.229
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Copyright © 2005 Hindawi Publishing Corporation. All rights reserved.

Incompressible conducting flow in an applied magnetic field at large interaction parameters

T. V. S. Sekhar, R. Sivakumar and T. V. R. Ravi Kumar

The flow of an incompressible, viscous, electrically conductingfluid past a sphere in an external magnetic field is investigatedat large interaction parameters 0≤ N≤ 30 for the Reynoldsnumbers 25 and 40. The interaction parameter N can bewritten as M2/2, where M is the Hartmann number. Theseparation at rear stagnation point of the sphere for the Reynoldsnumber 25 is completely inhibited by the magnetic field when N = 0.3. This separation reappears when N {approx} 5 increases inthe range 5 ≤ N ≤ 30. Similar behavior is also found forthe Reynolds number 40. A nonmonotonic behavior in separationangle is found when N>1. For higher values of N, the pressuredrag coefficient, total drag coefficient, and pressure at rearstagnation point vary with Formula. The upstream basepressure increases while the downstream base pressure decreaseswith the increase of N. The features found in this work are inaccordance with those of experimental findings.


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