Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-19T12:15:45.026Z Has data issue: false hasContentIssue false
  • English
  • Français

Experimental studies in magneto-fluid dynamics: pressure distribution measurements around a sphere

Published online by Cambridge University Press:  28 March 2006

T. Maxworthy
T. Maxworthy
Affiliation:
Jet Propulsion Laboratory California Institute of Technology, Pasadena, California
Get access Rights & Permissions [Opens in a new window]

Abstract

Measurements of the pressure distribution around a sphere placed in aligned magnetic and velocity fields show that an increase in drag is mainly due to a decrease in the pressure on the base of the body. When magnetic forces are large compared to inertia forces, this decrease is due to a loss in total pressure along streamlines just outside the surface boundary layer and an acceleration of the flow to a velocity much larger than the reference velocity. Separation of a viscous boundary layer takes place behind the equator and still, to a large extent, controls the magnitude of the base pressure and the drag experienced by the sphere. A model consistent with these findings is presented.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 31 , Issue 4 , 18 March 1968 , pp. 801 - 814
Copyright
© 1968 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Ahlstrom, H. G. 1963 Experiments on the upstream wake in magneto-fluid dynamics J. Fluid Mech. 15, 2.Google Scholar
Childress, W. S. 1963 On the flow of a conducting fluid of small viscosity. J.P.L. Tech. Rept. 32–351.Google Scholar
Fage, A. 1937 A.R.C. R. & M. no. 1766.
Horlock, J. H. 1963 Some two-dimensional magneto-fluid dynamic flows at low magnetic Reynolds number J. Fluid Mech. 16, 17.Google Scholar
Lary, E. C. 1962 A theory of thin aerofoils and slender bodies in fluids of finite electrical conductivity with aligned fields J. Fluid Mech. 12, 209.Google Scholar
Maxworthy, T. 1961 Liquid sodium flow facility for magneto-fluid dynamic research Rev. Sci. Inst. 32, 11.Google Scholar
Maxworthy, T. 1967 Experimental studies in magneto-fluid dynamics: Pipe flow through a solenoid of finite length. J.P.L. Tech. Rept. 32–1198.Google Scholar
Maxworthy, T. 1968 On the observed motion of a sphere through a short, rotating cylinder of fluid J. Fluid Mech. 31, 643.Google Scholar
Tamada, K. 1961 On the flow of inviscid conducting fluid past a circular cylinder with applied magnetic field. Cornell Univ. A.F.O.S.R. Rept. no. 1087.Google Scholar
Tamada, K. 1962 Flow of a slightly conducting fluid past a circular cylinder with strong, aligned magnetic field Phys. Fluids, 5, 7.Google Scholar
Yonas, G. 1966 Aligned fields, magneto-fluid dynamic flow past bodies. Ph.D. Thesis, Calif. Inst. of Tech.
Yonas, G. 1968 Measurements of drag in a conducting fluid with an aligned field and large interaction parameter J. Fluid Mech. 30, 813.Google Scholar