The structure of massloading shocks
Abstract
A new twofluid model which describes mass loading in the solar wind (e.g., the interaction of the solar wind with a cometary coma or the local interstellar medium) is presented. The selfconsistent backreaction of the massloaded ions is included through their effective scattering in lowfrequency MHD turbulence and the invocation of a diffusive approximation. Such an approximation has the advantage of introducing selfconsistent dissipation coefficients into the governing equations, thereby facilitating the intestigation of the internal structure of shocks in massloading environments. To illustrate the utility of the new model, we consider the structure of cometary shocks in the hypersonic onedimensional limit, finding that the incoming solar wind is slowed by both mass loading and the development of a large cometary ion pressure gradient. The shock is broadened and smoothed by the cometary ions with a thickness of the order of the cometary ion diffusion scale.
 Publication:

Journal of Geophysical Research
 Pub Date:
 April 1993
 DOI:
 10.1029/92JA02896
 Bibcode:
 1993JGR....98.5645Z
 Keywords:

 Cometary Atmospheres;
 Interstellar Matter;
 Magnetohydrodynamic Turbulence;
 Plasma Interactions;
 Solar Wind;
 Two Fluid Models;
 Mass Transfer;
 Shock Wave Interaction;
 COMETS;
 MODEL;
 MASS LOADING;
 SOLAR WIND;
 INTERACTION;
 COMAE;
 IONS;
 SHOCK WAVES;
 PRESSURE GRADIENT;
 THICKNESS;
 DIFFUSION;
 CALCULATIONS;
 LAYERS;
 MAGNETOHYDRODYNAMICS;
 PLASMA;
 FLOW;
 SCATTERING;
 TURBULENCE;
 Astrophysics; Comets;
 Interplanetary Physics: Solar wind plasma;
 Planetology: Comets and Small Bodies: Interactions with solar wind plasma and fields;
 Space Plasma Physics: Discontinuities;
 Space Plasma Physics: Transport processes