منابع مشابه
A hybrid kinetic-fluid model for solving the gas
Our purpose is to derive a hybrid model for particle systems which combines a kinetic description of the fast particles with a fluid description of the thermal ones. In the present work, fast particles will be described through a collisional kinetic equation of BoltzmannBGK type while thermal particles will be modeled by means of a system of Euler type equations. Then, we construct a numerical ...
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Introduction New spacecraft exploring the planets and moons of our solar system have greatly increased interest in atmospheric escape from planetary bodies. The Cassini spacecraft is currently improving our understanding of the atmospheres of the moons of Saturn. While in 2015 the New Horizons spacecraft will have a close flyby encounter with Pluto and the Maven mission will orbit Mars studying...
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A fluid–kinetic hybrid electron model for electromagnetic simulations of finite-b plasmas is developed based on an expansion of the electron response using the electron–ion mass ratio as a small parameter. ~Here b is the ratio of plasma pressure to magnetic pressure.! The model accurately recovers low frequency plasma dielectric responses and faithfully preserves nonlinear kinetic effects ~e.g....
متن کاملFrom a Kinetic to a Fluid Description
Starting from a microscopic approach, we develop a covariant formalism to describe a set of interacting gases. For that purpose, we model the collision term entering the Boltzmann equation for a class of interactions and then integrate this equation to obtain an effective macroscopic description. This formalism will be useful to study the cosmic microwave background non-perturbatively in inhomo...
متن کاملKinetic model for the hard-sphere fluid and solid
The revised Enskog kinetic theory ~RET! for a system of hard spheres provides an exceptionally broad description of mesoscopic and macroscopic dynamics, applicable for both fluid and solid phases, long and short wavelengths, low and high densities, and exact at short times. This great potential is compromised by the difficulty of obtaining solutions outside the domain of linear response. In the...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 1999
ISSN: 0148-0227
DOI: 10.1029/1998ja900065