# Tagged Questions

Magnetohydrodynamics or MHD is a magnetized fluid approximation to the kinetic theory describing a gas composed of charged particles.

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### Geometry of magnetic field lines in plasmas/MHD

So I'm trying to gain an intuitive grasp of plasmas and magnetohydrodynamics. There's a couple of questions I have. What does it means magnetic field lines are frozen into "plasmas"? Is it that ...
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### Solar wind and the Earth's magnetic field

I have again an old question from a comprehensive exam I took a couple of months ago. Lucky for me one could pick 5 out of 8 questions, because on some of the problems I didn't even know how to start. ...
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### Dependence of the magneto-rotational instability (MRI) on thermal relaxation?

The MRI is the most efficient driver of turbulence in accretion discs (as measured by the effective scalar stress). The magnetic field, being properly coupled to the gas (weak coupling), connects the ...
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### Faraday induction for seawater flow system

Magnetic flow meters use Faraday induction to produce a voltage across a channel in which a conductive fluid is flowing. The basic relationship (using convenient geometry so that the cross products ...
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### How to solve the following set of equations (magnetohydrodynamics with anomaly term)?

Let's have system of equations: $$\tag 1 [\nabla \times \mathbf E^{(1)}(\mathbf r , t) ] = -\frac{\partial \mathbf B^{(1)}(\mathbf r , t)}{\partial t} ,$$  \tag 2 [\nabla \times \mathbf B^{(1)}(\...
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### Does a conservative form of the Chew-Goldberger-Low MHD equations exist?

I wonder if is it possible to bring Chew-Goldberger-Low MHD equations to a conservative form? Conservative form of the system of equations of ideal MHD with isotropic pressure is well known and can be ...
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### the shallow water magnetohydrodynamic equations

I'am rather a mathematician, and i have a problem concerning the shallow water magnetohydrodynamic equations, namely : $\partial_t W + \partial_x F(W) + \partial_y G(W) = 0$ with \$ W = {\left ( ...