Combined Characteristics of MHD Resistance and Heat Exchange in a HLMC Flow in a Transverse Magnetic Field

2009 ◽  
Author(s):  
S. Yu. Savinov ◽  
A. V. Beznosov ◽  
O. O. Novozhilova ◽  
M. A. Antonenkov
Keyword(s):  
Magnetic Field ◽  
Velocity Structure ◽  
Experimental Studies ◽  
Transverse Magnetic ◽  
Thermodynamic Activity ◽  
Stream Velocity ◽  
Experimental Part ◽  
Carrier Stream ◽  
Coolant Velocity ◽  
Content Of Oxygen

Results of experimental research of lead-bismuth heat-carrier stream velocity structure in the cross-section magnetic field at a varied content of oxygen admixture and characteristics of oxide electroinsulating covers are presented. Experimental studies were carried out for the following operation parameters: the lead-bismuth eutectics temperature T = 400–420 °C; thermodynamic activity of oxygen in the coolant a = 10−4–100; the eutectics flow rate through the experimental part Q = 1.8–3.0 m3/h, the coolant velocity in the experimental part w = 1.0–1.7 m/s; the magnetic induction value B = 0–0.85 T; the Reynolds number Re = (1,6–2,7)·105; the Peclet number Pe = 320–4600, and the Hartmann number Ha = 0–365.

Heat Exchange Characteristics in Heat Supply and Heat Removal Parts of a Nonisothermal Circuit, Including Temperature and Velocity Fields in a HLMC Flow, for Controlled Impurity Content

2009 ◽  
Author(s):  
O. O. Novozhilova ◽  
A. V. Beznosov ◽  
S. Yu. Savinov ◽  
M. A. Antonenkov
Keyword(s):  
Heat Exchange ◽  
Oxygen Content ◽  
Velocity Structure ◽  
Experimental Studies ◽  
Heat Removal ◽  
Impurity Content ◽  
Stream Velocity ◽  
Carrier Stream ◽  
Temperature And Velocity Fields ◽  
Annular Clearance

Results of the experimental studies of the heat exchange to the lead heat-transfer agent in the annular clearance in the circulation contour with the controlled and operated processes of mass exchange and mass transfer of the oxygen content are presented. And results of experimental research of lead-bismuth heat-carrier stream velocity structure at a varied content of oxygen content are presented.

scholarly journals Convective heat and mass transfer in a non-Newtonian-flow formation in Couette motion in magnetohydrodynamics with time-varing suction

2011 ◽  
Vol 15 (3) ◽  
pp. 749-758 ◽  
Author(s):  
Faiza Salama
Keyword(s):  
Magnetic Field ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Perturbation Technique ◽  
Transverse Magnetic ◽  
Integration Scheme ◽  
Stream Velocity ◽  
Grashof Number ◽  
Moving Wall ◽  
Pressure Parameter

An analysis is carried out to study the effect of heat and mass transfer on a non-Newtonian-fluid between two infinite parallel walls, one of them moving with a uniform velocity under the action of a transverse magnetic field. The moving wall moves with constant velocity in the direction of fluid flow while the free stream velocity is assumed to follow the exponentially increasing small perturbation law. Time-dependent wall suction is assumed to occur at permeable surface. The governing equations for the flow are transformed into a system of nonlinear ordinary differential equations by perturbation technique and are solved numerically by using the shooting technique with fourth order Runge-Kutta integration scheme. The effect of non-Newtonian parameter, magnetic pressure parameter, Schmidt number, Grashof number and modified Grashof number on velocity, temperature, concentration and the induced magnetic field are discussed. Numerical results are given and illustrated graphically for the considered Problem.

Effect of magnetic field on viscoelastic wave characteristics

2017 ◽  
Vol 232 (19) ◽  
pp. 3482-3490 ◽  
Author(s):  
Gülen Dilara Günalp ◽  
Cemal Baykara ◽  
Uğur Güven
Keyword(s):  
Magnetic Field ◽  
Attenuation Coefficient ◽  
Transverse Magnetic Field ◽  
Experimental Studies ◽  
Magnetic Field Effect ◽  
Transverse Magnetic ◽  
Magnetic Field Effects ◽  
Low Frequencies ◽  
Remarkable Effect ◽  
Wave Characteristics

In this study, the longitudinal wave characteristics of magnetic field sensitive viscoelastic rods under the transverse magnetic field effect is addressed by including lateral inertia effect. The analysis is based on the Love rod theory. The polymeric rod is modeled as standard linear solid viscoelastic material. The obtained explicit solution is illustrated graphically. The comparative results of the analysis show that the transverse magnetic field has a remarkable effect on the wave phase velocity and attenuation coefficient. The transverse magnetic field especially leads to a significant reduction on attenuation coefficient for high frequencies values and large diameters. The analysis results presented here especially for low frequencies ranges can provide a reliable support for the similar experimental studies in related the magnetic field effects.

scholarly journals Effect of radiation and porosity parameter on magnetohydrodynamic flow due to stretching sheet in porous media

2011 ◽  
Vol 15 (2) ◽  
pp. 517-526 ◽  
Author(s):  
Phool Singh ◽  
Tomer Singh ◽  
Sandeep Kumar ◽  
Deepa Sinha
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Stretching Sheet ◽  
Transverse Magnetic ◽  
Stream Velocity ◽  
Electrically Conducting ◽  
Boundary Layer Equations ◽  
Porosity Parameter ◽  
Volumetric Rate ◽  
Two Dimensional Flow

An analysis is made for the steady two-dimensional flow of a viscous incompressible electrically conducting fluid in the vicinity of a stagnation point on a stretching sheet. Fluid is considered in a porous medium under the influence of (i)transverse magnetic field, (ii)volumetric rate of heat generation/absorption in the presence of radiation effect. Rosseland approximation is used to model the radiative heat transfer. The governing boundary layer equations are transformed to ordinary differential equations by taking suitable similarity variables. In the present reported work the effect of porosity parameter, radiation parameter, magnetic field parameter and the Prandtl number on flow and heat transfer characteristics have been discussed. Variation of above discussed parameters with the ratio of free stream velocity parameter to stretching sheet parameter have been graphically represented.

Numerical and Experimental Investigation of Melting in the Presence of a Magnetic Field: Simulation of Low-Gravity Environment

2006 ◽  
Vol 129 (4) ◽  
pp. 568-576 ◽  
Author(s):  
H. Zhang ◽  
M. Charmchi ◽  
D. Veilleux ◽  
M. Faghri
Keyword(s):  
Magnetic Field ◽  
Fluid Motion ◽  
Experimental Studies ◽  
Melting Behavior ◽  
Transverse Magnetic ◽  
Numerical Results ◽  
Working Fluid ◽  
Convection Flow ◽  
Low Gravity ◽  
The Magnetic Field

In this paper, numerical and experimental studies are presented on melting behavior of a pure metal in the presence of a static magnetic field. When a transverse magnetic field is present and the working fluid is electrically conductive, the fluid motion in the magnetic field results in a force field (Lorentz forces) that will dampen the convective flows. Buoyancy driven flows are the focus of this study to simulate low-gravity conditions. Hartmann (Ha) number, a dimensionless parameter proportional to the strength of the magnetic field, dominates the convection flow suppression. The effects of the magnetic strength on melting rate and on the profile of the solid/melt interface are studied. The experiments are conducted with pure gallium as phase change material inside a rectangular test cell. The solid thickness at its side center position is measured by an ultrasound device and the solid/melt interface profile is captured via reflection florescent-light photography. Temperature measurements and volume expansion/contraction tracking are used to provide further details and to verify the numerical results. Magnetically induced low-gravity environments were extensively studied numerically, where the details of the flow field were obtained. The experimental and numerical results compare very well especially, at larger Hartmann numbers. The results showed that a magnetic filed could be used to simulate key melting characteristics found in actual low-gravity environments. However, under strong magnetic field, numerical simulations revealed a different three-dimensional flow structure in the melt region compared to the actual low-gravity flow fields where the flow circulations are smoothly curved.

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