Stability study for the MHD problem in perforated and parallel walls

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Abstract

We have studied the stability of a conducting fluid when it is continuously injected or ejected through a pair of parallel porous walls and escapes in both directions along the channel. The flow forms a stagnation point at the center and the effluence is restricted by a magnetic field perpendicular to the walls. A theoretical analysis of the steady state solutions of the MHD equations in the incompressible case is given as a function of three parameters Re, Rm and MA (Re: Reynolds number, Rm: magnetic Reynolds number, MA: Alfvenic Mach number), for some asymptotic limits. In the case of suction, critical values of the parameters are found for which there are bifurcations in the system. Such bifurcations are pitchfork type. In the case of injection, the flux results always stable. © 2007 Elsevier Inc. All rights reserved.

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Ospina, R., Devia, D. M., Arango, Y. C., Arango, P. J., & Devia, A. (2008). Stability study for the MHD problem in perforated and parallel walls. Applied Mathematical Modelling, 32(6), 1003–1016. https://doi.org/10.1016/j.apm.2007.02.027

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