Format:
27 S.
,
graph. Darst
,
30 cm
Series Statement:
Preprint NLD 044
Content:
The stability of the quiescent ground state of an incompressible, viscous and electrically conducting fluid sheet, bounded by stress-free parallel planes and driven by an external electric field tangential to the boundaries, is studied numerically. The electrical conductivity varies as cosh–2(x1/a), where x1 is the cross-sheet coordinate and a is the half width of a current layer centered about the midplane of the sheet. For a 〈~ 0.4L, where L is the distance between the boundary planes, the ground state is unstable to disturbances whose wavelengths parallel to the sheet lie between lower and upper bounds depending on the value of a and on the Hartmann number. Asymmetry of the configuration with respect to the midplane of the sheet, modelled by the addition of an externally imposed constant magnetic field to a symmetric equilibrium field, acts as a stabilizing factor.
Additional Edition:
Erscheint auch als Online-Ausgabe Seehafer, Norbert Resistivity profile and instability of the plane sheet pinch Potsdam : NLD, 1998
Language:
English
Author information:
Schumacher, Jörg 1966-