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Wednesday, August 12, 2020 | History

2 edition of Sub-alfvénic flow in a duct with a nonuniform magnetic field. found in the catalog.

Sub-alfvénic flow in a duct with a nonuniform magnetic field.

Roger Peyret

Sub-alfvénic flow in a duct with a nonuniform magnetic field.

by Roger Peyret

  • 217 Want to read
  • 19 Currently reading

Published by Jet Propulsion Laboratory, California Institute of Technology in Pasadena .
Written in English

    Subjects:
  • Magnetohydrodynamics.

  • Edition Notes

    SeriesJPL technical report, no. 32-871
    Classifications
    LC ClassificationsQC718 .P4
    The Physical Object
    Paginationiii, 17 p.
    Number of Pages17
    ID Numbers
    Open LibraryOL5980833M
    LC Control Number66009513
    OCLC/WorldCa17434169

    Single- and multi-phase flows in an electromagnetic field: energy, metallurg., and solar applications ; technical papers from the proceedings of the 4th Beer-Sheva Internat. Seminar on Magnetohydrodynamic Flows and Turbulence, Ben Gurion Univ. of the Neg | Herman Branover; Beer-Sheva International Seminar on Magnetohydrodynamic Flows and Turbulence (4, , Beersheba) | download | B–OK. Pumping Characteristics. Figure 3 illustrates the variation of pressure gradient over one wave effects of,, and on pressure gradient are displayed in Figures 3(a)–3(c).It can be seen from Figure 3(a) that increasing of Hartmann number increases the pressure gradient. It shows that when strong magnetic field is applied to the flow field then higher pressure gradient is.

    Abstract: In this paper, a meshless global element-free Galerkin method is given to obtain the numerical solutions of the coupled equations in the velocity and magnetic field for the unsteady magnetohydrodynamic flow through a straight duct with arbitrary electrical conductivity, that is, from perfectly conducting to insulated duct walls. In this study, hydrodynamic behavior nanofluid (Fe3O4-water) in a MicroChannel Heat Sink (MCHS) with Offset Fan Shaped under magnetic field was numerically investigated. The two phase mixture model was used to simulate the nanofluid flow. Flow was assumed laminar, steady and incompressible.

    In the currently proposed helium cooled lead lithium blanket design the liquid metal serves mainly to breed tritium and the heat flux is removed by helium flowing at high pressure in channels grooved in the walls. The use of a separate coolant has the advantage that the liquid metal can flow in the blanket with smaller velocities compared to those required in self-cooled blanket concepts. Figs Figs2 2 and and3 3 preserve the effects of magnetic field strength on the dimensionless x− and y− components of velocity respectively. The function g(η) has a parabolic profile and its value is negative revealing that flow occurs in the negative y− the Hartman number M enlarges, the flow decelerates in both x− and y− directions.


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Sub-alfvénic flow in a duct with a nonuniform magnetic field by Roger Peyret Download PDF EPUB FB2

The flow of a conducting fluid in a duct in the presence of a magnetic field with a small nonuniformity of the following kind is considered: for x field is uniform and parallel to the axis 0x of the duct; for x > 0, the field is nonuniform and the curvature of the magnetic lines is small, of order ε.A perturbation theory is presented for the case of small magnetic Reynolds number R Cited by: 1.

Liquid metal flow in a rectangular duct in a plane cusped magnetic field is considered with the main objective being to investigate the effect of the sidewalls on the flow. At high values of the Hartmann number Ha the velocity profile is characterized by the presence of three jets.

One jet is at the symmetry plane, where the transverse component of the magnetic field changes sign, and the Author: S. Molokov, D.

Emmrich, V. Kutev. Under these assumptions, viscous and inertial effects are confined in very thin boundary layers adjacent to the walls. At walls parallel to the magnetic field lines, as at the side walls of a rectangular duct, the boundary layers (side layers) carry a significant fraction of the volumetric flow.

A detailed understanding of the flow of a liquid metal in a rectangular duct subject to a strong transverse magnetic field is vital in a number of engineering applications, notablAuthor: Michael J.

Bluck. In this paper, the influence of a non-uniform magnetic field on biomagnetic fluid flow in a duct with a constriction is investigated numerically. The magnetic field is generated by a wire carrying. MHD flow in an insulating rectangular duct under a non-uniform magnetic field is studied by Moreau ().

Numerical simulations of MHD flows past obstacles in a duct under externally applied magnetic field is studied by Dousset.V (). Abstract. Followed by a review of previous studies of magnetohydrodynamic (MHD) duct flows in a non-uniform magnetic field at the entry into a magnet (fringing magnetic field), the associated MHD problem is revisited for a particular case of a nonconducting rectangular duct of a small aspect ratio ε = b/a (here, b is the duct half-width in the magnetic field direction, and a is the half-height).

Heat transfer characteristics of a circular cylinder in the branch of a T-junction duct are experimentally investigated in a low-speed wind tunnel with Reynolds number of Re b = Local and average heat transfer distributions around the circular cylinder are obtained for the cylinder positions ranging from to 13 and the velocity ratios ranging from to The flow and thermal characteristics in a parallel duct-type energy conversion device utilizing a magnetic fluid under a nonuniform magnetic field were analysed using theoretical equations from heat conduction suggesting a laminar developing flow.

Description. This volume presents fundamentals for laminar and turbulent flow (Chapters I and II), but then emphasizes two-phase flows in the presence of magnetic fields (Chapter III)--an area of great complexity, both experimentally and theoretically, with implications for many applications.

Non-uniform magnetic field can affects the flow more in low Reynolds numbers. Abstract In this paper, the concentration polarization phenomena in a two dimensional tube under steady state conditions containing ferrofluid (blood and 4 vol% Fe 3 O 4) is reported in the presence of non-uniform magnetic field.

This study reports magnetic-fluid flow in a square duct under DC, AC, and DC+AC magnetic fields. We measure the pressure drop under application of different magnetic fields to the flow. Under all magnetic fields, flow resistance increased by forming a cluster, causing the pressure drop and friction factor to.

This paper analyses numerically the quasi-two-dimensional flow of an incompressible electrically conducting viscous fluid past a localized zone of applied magnetic field, denominated a magnetic applied field is produced by the superposition of two parallel magnetized square surfaces, uniformly polarized in the normal direction, embedded in the insulating walls that contain the flow.

The main assumptions of the previous theories on duct flows in non-uniform magnetic fields are revisited in the case of a slotted duct with a small aspect ratio ε = b/a.

Temperley, D. [dagger] MHD flow in a rectangular duct under a uniform transverse magnetic field at high Hartmann number. Temperley, D. & Todd, L. The effects of wall conductivity in MHD duct flows at high Hartmann number Proc. Camb. Phil. Soc. 69, Analytical solutions to non-uniform surface heat transfer with volumetric sources in magnetohydrodynamic duct flow.

File Description Size Format ; Bluck_Anlytical solutions ton : Accepted version: MB: Adobe PDF: View/Open. Title: Analytical solutions to non-uniform surface heat transfer with volumetric sources in.

1. Introduction. Application of magnetic field in medical science and biologic systems is one of the major topics in magneto-science. Magnetic drug targeting, magnetic devices for cell separation, adjusting blood flow during the surgery, transporting complex bio-waste fluids, controlling gastro-intestinal disorders by magnetic field, cancer tumour treatment, magnetic endoscopy, and.

Followed by a review of previous studies of magnetohydrodynamic (MHD) duct flows in a non-uniform magnetic field at the entry into a magnet (fringing magnetic field), the associated MHD problem is revisited for a particular case of a nonconducting rectangular duct of a small aspect ratio ε = b/a (here, b is the duct half-width in the magnetic field direction, and a is the half-height).

The effects of magnetic field are tested for carbon nanotubes suspensions, peristaltic flow of Jeffrey fluid, unsteady separated stagnation-point flow, and forced convection through semi-annulus. Qin et al. [ 20 ] offers a new, simpler approach that, for the first time, makes it possible to continuously measure the reflectivity of non.

Fringe currents in a nonuniform magnetic field [Abstract] [PDF] [PDF] G. Gurevich and G. Kirshtein. Effect of nonuniformity of the magnetic field and velocity profile in a conduction flowmeter with a rectangular duct at Re m.

The aim of this paper is to investigate the effect of the variable thermal conductivity and the inclined uniform magnetic field on the plane Poiseuille flow of viscous incompressible electrically conducting fluid between two porous plates Joule heating in the presence of a constant pressure gradient through non-uniform plate temperature.

It is assumed that the fluid injection occurs at lower.Technical Report: Flow of two-dimensional liquid metal jet in a strong magnetic field. Title: Flow of two-dimensional liquid metal jet in a strong magnetic field.

Full Record.Liquid metal flow in a straight duct in a fringing magnetic field is considered. The magnetic field is uniform with two different levels upstream and downstream.

In the region of a nonuniform magnetic field, the gradient of the field is aligned with the duct axis. The flow is assumed to be inertialess.