# Free-boundary magnetohydrodynamic equilibria with flow

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A three-dimensional equilibrium theory [J. Geophys. Res. 92, 11 101 (1987)] for stretched plasma configurations, such as the Earthâ€™s magnetotail, is extended to include the effects of field-aligned flow. The magnetohydrodynamic (MHD) equations for this case can be solved in a general way...

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The tangential layers are characterized by a bulk plasma velocity and a magnetic field that are perpendicular to the gradient direction. They have been extensively described in the frame of the magnetohydrodynamic (MHD) theory. But the MHD theory does not look inside the transition region if the...

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Determines the effects of plasma equilibria on dipolar magnetic configurations. Derivation of equations governing the plasma equilibria; Evaluation on magnetohydrodynamic stability of plasma equilibria; Consideration of the equilibria of rotating plasmas and flows in a gravitational field.

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The cylindrical ideal magnetohydrodynamic (MHD) stability problem, including flow and a resistive wall, is cast in the standard mathematical form, Ï‰AÂ·x=BÂ·x, without discretizing the vacuum regions surrounding the plasma. This is accomplished by means of a finite element expansion for...

- Magnetized plasma flows and magnetoplasmadynamic thrusters. Andreussi, T.; Pegoraro, F. // Physics of Plasmas;Jun2010, Vol. 17 Issue 6, p063507
An axisymmetric magnetohydrodynamics (MHD) model of the acceleration channel of an applied-field magnetoplasmadynamic thruster is presented. A set of general relationships between the flow features and the thruster performance is obtained. The boundary conditions and the flow regime, which...

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The sensitivity of a high-ï¿½ quasi-isodynamic stellarator equilibrium with respect to changes of the plasma pressure is investigated. It is shown that a plasma boundary near to the high-ï¿½ boundary exists with the property that the magnetohydrodynamic and drift-kinetic properties of the...

- Magnetohydrodynamic equilibrium of plasma ball lightning. Wu, Hanming; Chen, Yunming // Physics of Fluids B: Plasma Physics;Aug89, Vol. 1 Issue 8, p1753
A study is done of magnetohydrodynamic (MHD) equilibrium of a self-confined plasma ball imbedded in an atmosphere with constant pressure p0. It is found that there is more than one equilibrium state for the plasma ball and the average pressure inside the ball is less than p0. It is also shown...

- The role of edge current density on kink mode stability and its implication for magnetohydrodynamic activity associated with edge localized modes. Manickam, Janardhan // Physics of Fluids B: Plasma Physics;Jul92, Vol. 4 Issue 7, p1901
The stability of a plasma equilibrium to the external kink mode is shown to be dependent on the details of the current density near the plasma edge and the value of the safety factor, q, at the edge. The buildup of the current density near the plasma edge is shown to decrease the shear in the...

- Equilibrium and resistive steady state of an axisymmetric co-axial helicity injection plasma. Tang, X. Z.; Boozer, A. H. // Physics of Plasmas;Sep2003, Vol. 10 Issue 9, p3661
Steady state (âˆ‚B/âˆ‚t=âˆ‚v/âˆ‚t=0) coaxial helicity injection (CHI) has a purely electrostatic E =-âˆ‡[uppercase_phi_synonym](Ïˆ,Î¸) field. The electrostatic potential implies an EÃ—B flow that scales with the externally imposed voltage and is negligibly affected by...