Three-Dimensional Flow Analysis in a Faraday-Type MHD Generator

Hardianto, Triwahju; Sakamoto, Nobuomi; Harada, Nobuhiro

doi:10.1109/tia.2008.926200

Cited by 13 publications

(9 citation statements)

References 11 publications

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“…In other words, the effect of the end current on the performance of the thruster increases with these two parameters. This can be explained by using the electric field equation in the MHD channels (see (2)). If the magnetic field intensity at the end of the electrodes is so small that it can be assumed equal to zero, γ can be obtained as…”

Section: Resultsmentioning

confidence: 99%

“…where E 0 is the external electric field applied to the electrodes, E t is the electric field drop caused by the electrochemical effects, v ex is the fluid velocity in the MHD channel and is the electrical conductivity of seawater. Substituting (2) into (1) gives…”

Section: Analytical Modelmentioning

confidence: 99%

“…Magnetohydrodynamics (MHD) mainly studies the behaviour of electrically conducting fluids in electromagnetic fields. Several applications are based on the MHD concept, such as electromagnetic pumping of molten metals [1], MHD power generation [2,3], and MHD propulsion [4]. MHD propulsion is the idea of accelerating a conductive fluid using the Lorentz force which is the basis of all electromagnetic propulsion systems [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of the effects of magnetic field and fluid electrical conductivity on the performance of marine magnetohydrodynamic motors

Haghparast

Pahlavani

Azizi

2018

IET Electric Power Applications

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A magnetohydrodynamic (MHD) thruster is a type of electric motors which does not have mechanical moving parts and directly converts electrical energy into mechanical energy. In this study, the effect of magnetic field intensity and seawater electrical conductivity on the performance of a marine MHD thruster model is investigated using fully three-dimensional numerical simulations. For the first time, all electric, magnetic and fluid flow fields are considered in three dimensions. The effects of seawater electrolysis and end loss are taken into account in all simulations and a simple analytical model is developed to verify the numerical results. It is shown that increasing the magnetic field intensity or the electrical conductivity of the working fluid decreases the electrochemical and ohmic losses of the thruster at a specific velocity. Therefore, a higher efficiency can be achieved at higher magnetic field strengths and higher seawater electrical conductivities. Also, it is revealed the end loss of the channel increases with an increase in the electrical conductivity of the working fluid and decreases with an increase in the magnetic field intensity.

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Section: Resultsmentioning

confidence: 99%

Section: Analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical investigation of the effects of magnetic field and fluid electrical conductivity on the performance of marine magnetohydrodynamic motors

Haghparast

Pahlavani

Azizi

2018

IET Electric Power Applications

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“…This MHD power system type is fired by an independent highpressure high-temperature combustor to produce high-velocity plasma. The new development on MHD power generation is used for aerospace applications [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Performance of Magneto Hydrodynamics Generator in Presence of Hall Effect

Khatibzadeh

Pahlavani

2012

IJET

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Studying of high-temperature plasmas exposed to strong electromagnetic ?eld is Magneto Hydrodynamics. Also, it is used to obtain an electrical power. This paper proposes a simple model of MHD generator. Moreover, efficiency of different configuration of this generator is obtained by this model. Also, this paper compares different configurations of Faraday generator with the Hall generator based on their isotropic efficiency. Moreover, this model considers the effect of Hall Effect (Ion slip) on the efficiency. This analysis proof that Hall Effect decrease the efficiency in Faraday generator but increase the efficiency in the Hall generator.

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“…However, it is a well-founded and important generalization of the original Navier-Stokes model, covering several more phenomena than the classical one, in theory and applications. MHD (magnetohydrodynamics) has received considerable interest in renewable energy systems for a wide range of applications involving space travel [6], ocean resources [7], [8], coal-fired power plants [9] and materials processing [10]. Tale systems for Mars missions [11] engineers have developed that the ionization sheath encapsulating the spacecraft can be significantly reduced by generating MHD power, as the intensity (and therefore harmful impact) of the ionization sheath is effectively subdued in key zones as electrons and ions are diverted by the magnetic field and extracted from the electrodes.…”

mentioning

confidence: 99%

Double Diffusion Non-Isothermal Thermo-Convective Flow of Couple Stress Micropolar Nanofluid Flow in a Hall MHD Generator System

et al. 2020

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Nanofluids are potential liquids that enhance the thermophysical characteristics and the ability to transport heat rather than base liquids. This article discusses the non-isothermal heat transfer of the convective steady flow of magnetohydrodynamic micropolar nanofluid over a non-linear extended wall, considering the effects of Brownian motion and thermophoresis, coupled stress, hall current and viscous dissipation effects. Fluid flow is controlled by a high magnetic field. The system of equations is resolved using the Homotopy Analysis Method (HAM) technique and the results are visualized graphically. The effects of different fluid parameters summarizing the problem behavior on primary, secondary and angular velocity, temperature, volume fraction and nanoparticle concentration profiles are measured using graphs. The primary velocity component decreased throughout the entire flow study with magnetic, couple stress and Hall parameters. The large magnetic field parameter and the smaller couple stress parameter lower the secondary velocity, while the increase of the local Grashof number increases the secondary velocity. The strong magnetic parameter, the local Grashof number and the couple stress parameter reduce the angular velocity as observed. The large magnetic parameter, Grashof number, Hall parameter and radiation parameter reduces temperature, while the temperature increases with the increase in Brinkman number and Prandtl number. Brownian motion and thermophoresis encourage the transfer of heat. Tables are used to highlight the impact of dimensionless parameters on the skin friction coefficient, Nusselt and Sherwood numbers. INDEX TERMS Convective heat transfer, couple stress, hall current, HAM, hall MHD flow, micropolar nanofluid. NOMENCLATURE Re Local Reynolds number T Fluid temperature (K) u, v, w Velocity components of the dust particles ms −1 The associate editor coordinating the review of this manuscript and approving it for publication was Giovanni Angiulli. x, y, z Coordinate axis φ w Wall volume fraction of nanofluid φ ∞ Volume fraction at infinity T ∞ Temperature at infinity T w Wall temperature C w Wall concentration C ∞ Concentration at infinity

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Three-Dimensional Flow Analysis in a Faraday-Type MHD Generator

Cited by 13 publications

References 11 publications

Numerical investigation of the effects of magnetic field and fluid electrical conductivity on the performance of marine magnetohydrodynamic motors

Numerical investigation of the effects of magnetic field and fluid electrical conductivity on the performance of marine magnetohydrodynamic motors

Comparison of Performance of Magneto Hydrodynamics Generator in Presence of Hall Effect

Double Diffusion Non-Isothermal Thermo-Convective Flow of Couple Stress Micropolar Nanofluid Flow in a Hall MHD Generator System

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