Numerical simulation of the dynamic and thermodynamic an MHD micropump by independently changing the lengths of electric and magnetic fields

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In this paper the effect of electric and magnetic-field lengths to change independently is simulated on the temperature distribution and flow velocity of a magnetohydrodynamic micropump considering the lateral electromagnetic diffusive regions. The geometry of MHD flow is a two-dimensional channel between two parallel plates and governing equations of both flow and electromagnetic fields have been solved using the finite volume numerical method. The numerical results show that by applying the temperature allegiance of fluid properties, for a flow in a channel of 1000 mm2 cross-section, magnetic field intensity 0.025 Tesla and electric field strength 20 volt/mm, the flow rate reaches 250 mLit/s when the electric and magnetic field length are changed. However in the case of independent change of magnetic field length, the mean cup temperature from 25 0C at entrance, reaches to 45 0C at exit and in the case of independent change of electric the exit temperature reaches to 35 0C. In the situation of constant properties, the maximum flow rate reaches to 70 mLit/s, while the mean cup temperature reaches to 140 0C for the case of independent change of magnetic field length and 50 0C for the case of independent change of electric field length.

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Journal of Solid and Fluid Mechanics
Volume 5, Issue 3 - Serial Number 3
September and October 2015
Pages 271-287

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