A two-component transport model for solar wind fluctuations: Waves plus quasi-2D turbulence
Oughton, S., Matthaeus, W.H., Smith, C.W. & Breech, B. (2010). A two-component transport model for solar wind fluctuations: Waves plus quasi-2D turbulence. AIP Conference Proceedings, 1216(1), 210-213.
Permanent Research Commons link: https://hdl.handle.net/10289/4627
We present a model for the transport of solar wind fluctuations, based on the assumption that they can be well-represented using two distinct components: a quasi-2D turbulence piece and a wave-like piece. For each component, coupled transport equations for its energy, cross helicity, and characteristic lengthscale(s) are derived, along with an equation for the proton temperature. This energy-containing “two-component” model includes the effects of solar wind expansion and advection, driving by stream shear and pickup ions, and nonlinear cascades. Nonlinear effects are modeled using a recently developed one-point phenomenology for such a two-component model of homogeneous MHD turbulence . Heating due to these nonlinear effects is included in the temperature equation. Numerical solutions are discussed and compared with observations
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