Experimental and numerical study of electrically driven magnetohydrodynamic flow in a modified cylindrical annulus. II. Instabilities

2015 ◽  
Vol 27 (8) ◽  
pp. 084108 ◽  
Author(s):  
Zacharias Stelzer ◽  
Sophie Miralles ◽  
David Cébron ◽  
Jérôme Noir ◽  
Stijn Vantieghem ◽  
...  
Keyword(s):  
Numerical Study ◽  
Magnetohydrodynamic Flow ◽  
Cylindrical Annulus

Experimental and numerical study of electrically driven magnetohydrodynamic flow in a modified cylindrical annulus. I. Base flow

2015 ◽  
Vol 27 (7) ◽  
pp. 077101 ◽  
Author(s):  
Zacharias Stelzer ◽  
David Cébron ◽  
Sophie Miralles ◽  
Stijn Vantieghem ◽  
Jérôme Noir ◽  
...  
Keyword(s):  
Numerical Study ◽  
Base Flow ◽  
Magnetohydrodynamic Flow ◽  
Cylindrical Annulus

Comparative Numerical Simulation of Natural Convection in a Porous Horizontal Cylindrical Annulus

2014 ◽  
Vol 670-671 ◽  
pp. 613-616 ◽  
Author(s):  
Jabrane Belabid ◽  
Abdelkhalek Cheddadi
Keyword(s):  
Natural Convection ◽  
Numerical Study ◽  
Saturated Porous Medium ◽  
Published Data ◽  
Governing Equations ◽  
Alternating Direction Implicit ◽  
Cylindrical Annulus ◽  
Alternating Direction ◽  
Concentric Cylinders ◽  
Good Agreement

This work presents a numerical study of the natural convection in a saturated porous medium bounded by two horizontal concentric cylinders. The governing equations (in the stream function and temperature formulation) were solved using the ADI (Alternating Direction Implicit) method and the Samarskii-Andreev scheme. A comparison between the two methods is conducted. In both cases, the results obtained for the heat transfer rate given by the Nusselt number are in a good agreement with the available published data.

Topological analysis of separation phenomena in liquid metal flow in sudden expansions. Part 2. Magnetohydrodynamic flow

2011 ◽  
Vol 674 ◽  
pp. 132-162 ◽  
Author(s):  
C. MISTRANGELO
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Scaling Laws ◽  
Numerical Study ◽  
Topological Analysis ◽  
Metal Flow ◽  
Magnetohydrodynamic Flow ◽  
Sudden Expansion ◽  
Internal Layers ◽  
Flow Topology

A numerical study has been carried out to analyse liquid metal flows in a sudden expansion of electrically conducting rectangular ducts under the influence of an imposed uniform magnetic field. Separation phenomena are investigated by selecting a reference Reynolds number and by increasing progressively the applied magnetic field. The magnetic effects leading to the reduction of the size of separation zones that form behind the cross-section enlargement are studied by considering modifications of flow topology, streamline patterns and electric current density distribution. In the range of parameters investigated, the magnetohydrodynamic flow undergoes substantial transitions from a hydrodynamic-like flow to one dominated by electromagnetic forces, where the influence of inertia and viscous forces is confined to thin internal layers aligned with the magnetic field and to boundary layers that form along the walls. Scaling laws describing the reattachment length and the pressure drop in the sudden expansion are derived for intense magnetic fields.

Numerical study of entropy analysis for electrical unsteady natural magnetohydrodynamic flow of nanofluid and heat transfer

2017 ◽  
Vol 55 (5) ◽  
pp. 1821-1848 ◽  
Author(s):  
Yahaya Shagaiya Daniel ◽  
Zainal Abdul Aziz ◽  
Zuhaila Ismail ◽  
Faisal Salah
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Magnetohydrodynamic Flow ◽  
Entropy Analysis
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