نتایج جستجو برای: نرمافزار maxwell

تعداد نتایج: 11959  

2003
Bengt Eliasson

The two-dimensional Vlasov–Maxwell system, for a plasma with mobile, magnetised electrons and ions, is investigated numerically. A previously developed method for solving the two-dimensional electrostatic Vlasov equation, Fourier transformed in velocity space, for mobile electrons and with ions fixed in space, is generalised to the fully electromagnetic, two-dimensional Vlasov–Maxwell system fo...

2016
H. R. Brand H. Pleiner W. Renz

2014 We present a new approach to the linear macroscopic behaviour of polymeric liquids and melts in terms of the macroscopic variables : velocity field, density, entropy density and strain field and we discuss how the classical Maxwell model emerges as a limiting special case. The novel approach used here, which considers the strain field as an additional macroscopic variable that relaxes on t...

2012
P. J. Morrison

A theory for lifting equations of motion for charged particle dynamics, subject to given electromagnetic like forces, up to a gauge-free system of coupled Hamiltonian Vlasov-Maxwell like equations is given. The theory provides very general expressions for the polarization and magnetization vector fields in terms of the particle dynamics description of matter. Thus, as is common in plasma physic...

Journal: :SIAM J. Numerical Analysis 2014
Yingda Cheng Irene M. Gamba Fengyan Li Philip J. Morrison

Discontinuous Galerkin methods are developed for solving the Vlasov–Maxwell system, methods that are designed to be systematically as accurate as one wants with provable conservation of mass and possibly total energy. Such properties in general are hard to achieve within other numerical method frameworks for simulating the Vlasov–Maxwell system. The proposed scheme employs discontinuous Galerki...

1999
A. E. Chubykalo

Dvoeglazov’s paper is not trivial because we know the classical definition of any non-trivial truth: a truth is not trivial if and only if an opposite statement is not false (and vice versa, of course). So I strongly recommend his paper for a reader. But I have a few notes: 1) V. Dvoeglazov writes in his footnote number 7: ”In my opinion, equations (20,21) of ref. [1] are just another form of t...

2002
Stephan I. Tzenov Ronald C. Davidson

Based on the Vlasov-Maxwell equations describing the self-consistent nonlinear beam dynamics and collective processes, the evolution of an intense sheet beam propagating through a periodic focusing field has been studied. In an earlier paper [1] it has been shown that in the case of a beam with uniform phase space density the Vlasov-Maxwell equations can be replaced exactly by the macroscopic w...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2008
John S Reid

This account of Maxwell as professor of natural philosophy at Marischal College, Aberdeen, fills in many details that have been left out of Maxwell's biographies. It discusses the degree programme that Maxwell taught on, the nature of his colleagues, the type of student he had in his classes and the range of activities involved in his teaching. Evidence is cited that Maxwell was an enthusiastic...

2000
Subir Ghosh

A " Master " gauge theory is constructed in 2+1-dimensions through which various gauge invariant and gauge non-invariant theories can be studied. In particular, Maxwell-Chern-Simons, Maxwell-Proca and Maxwell-Chern-Simons-Proca models are considered here. The Master theory in an enlarged phase space is constructed both in Lagrangian (Stuckelberg) and Hamil-tonian (Batalin-Tyutin) frameworks, th...

Journal: :Applied Mathematics and Computation 2006
Youbing Yin Ke-Qin Zhu

The unidirectional oscillating flow of a viscoelastic fluid with the fractional Maxwell model is studied. The flow is produced by a periodic pressure gradient in an infinite straight pipe. Exact solutions are obtained in the time and frequency domains by using Fourier transform. The fractional Maxwell model exhibits resonance phenomena similar to that of the Maxwell model. However, the number o...

ژورنال: :مهندسی عمران مدرس 0
حسین محمودی دوم نیاسر محمد فاروق حسینی مرتضی احمدی اسماعیل جلالی

چکیده - سد گتوند از نوع سنگریزهای بوده و در استان خوزستان روی رودخانه کارون در حال ساخت میباشد. پی سد در سازند آغاجاری قرار خواهد گرفت که شامل ماسه سنگ و گلسنگ بوده که به صورت تناوبی روی هم قرار گرفتهاند. مقاومت تکمحوره سنگهای مذکور به ترتیب برابر 15 و 25 مگاپاسکال است یعنی جزو سنگهای ضعیف و متوسط محسوب می شوند. عواملی مانند باربرداری مداوم روباره حاصل از فرسایش بر اثر جریان رودخانه و همچنین با...

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