نتایج جستجو برای: plasma kinetic theory

تعداد نتایج: 1203725  

2008
Lúıs Bento

Quantum field theory is applied to study the interaction of an electron plasma with an intense neutrino flux. A connection is established between the field theory results and classical kinetic theory. The dispersion relation and damping rate of the plasma longitudinal waves are derived in the presence of neutrinos. It is shown that Supernova neutrinos are never collimated enough to cause non-li...

2004
Alain J. Brizard

A new formulation for collisional kinetic theory is presented based on the use of Lietransform methods to eliminate fast orbital time scales from a general bilinear collision operator. As an application of this new formalism, a general guiding-center bilinear FokkerPlanck (FP) collision operator is derived following the elimination of the fast gyromotion time scale of a charged particle moving ...

Journal: :Mathematical modeling and computing 2023

We propose an approximation of pair correlations for solving the equations kinetic theory long-wave (or large-scale) fluctuations in gaseous media. The basic ones are general nonlinear large-scale at stage system evolution, derived from first principles statistical mechanics. show that based on kinetics case weak interaction between particles, it is possible to reproduce main results quasi-line...

2016
Junya Shiraishi Naoaki Miyato Go Matsunaga

It is found that new channels of energy exchange between macro- and microscopic dynamics exist in plasmas. They are induced by macroscopic plasma flow. This finding is based on the kinetic-magnetohydrodynamic (MHD) theory, which analyses interaction between macroscopic (MHD-scale) motion and microscopic (particle-scale) dynamics. The kinetic-MHD theory is extended to include effects of macrosco...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی 1385

سیستم معادلات ولاسوف پواسون با استفاده از روش مشخصه ها شبیه سازی شده است. برای حل معادلات مشخصه، روش پرش قورباغه ای-ذوزنقه ای به کار برده شده است. روش شبیه سازی نقاط فضای فاز را بر روی مسیرهایی که تابع توزیع در آنها ثابت است به پیش می برد. دقت زمانی روش، از مرتبه ی دوم ارتقا یافته است و دقت مکانی آن از مرتبه ی چهار می باشد. پدیده های مشاهده شده نظیر ناپایداری دو جریانی ، میرایی لاندائو و تولید ...

2004

Kinetic theory is the simplest approach that describes the dynamics of enormous numbers of particles. Often it is the only one where we can make progress in actually calculating numbers such as viscosity or electrical conductivity! It describes nearly ideal gases: usually the interactions are only taken into account in the collisions (to be defined below) that lead to the approach to equilibriu...

Journal: :international journal of nano dimension 0
s. asadi department of mechanical engineering, payame noor university, tehran, iran.

a novel computational fluid dynamics and molecular kinetic theory (cfd-mk) method was developed to simulate the impingement of a nanodroplet onto a solid surface. a numerical solution of the navier–stokes equation using a volume-of-fluid (vof) technique was used to model nanodroplet deformation. dynamic contact angle during droplet impact was obtained by molecular kinetic theory. this dynamic c...

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