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Plasma: MHD; what about neutral fluids?

  1. Apr 30, 2008 #1
    When I have an ionized fluid (plasma) and I describe it in a continuum approach I can use the MHD equations (the continuity equation, the equation of motion, the induction equation and the energy equation).

    However; I am modeling a certain model of a sunspot and there is also an unionized part (neutral part) present.

    How do I model that part? Can I just drop the induction equation and set B=0 in the other equations (the continuity equation, equation of motion and the induction equation?), because the magnetic field has no influence on the neutral part and so I need 1 equation less to calculate all variables?
  2. jcsd
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