Scale analysis of a hydrodynamic model of plasma

2014 ◽  
Vol 25 (02) ◽  
pp. 371-394 ◽  
Author(s):  
Donatella Donatelli ◽  
Eduard Feireisl ◽  
Antonín Novotný
Keyword(s):  
Hydrodynamic Model ◽  
Debye Length ◽  
Careful Analysis ◽  
Euler System ◽  
Limit Problem ◽  
Singular Limit ◽  
Scale Analysis ◽  
Small Ratio ◽  
High Reynolds ◽  
Incompressible Euler

We examine a hydrodynamic model of the motion of ions in plasma in the regime of small Debye length, a small ratio of the ion/electron temperature, and high Reynolds number. We analyze the associated singular limit and identify the limit problem — the incompressible Euler system. The result leans on careful analysis of the oscillatory component of the solutions by means of Fourier analysis.

GLOBAL WEAK SOLUTIONS OF THE ONE-DIMENSIONAL HYDRODYNAMIC MODEL FOR SEMICONDUCTORS

1993 ◽  
Vol 03 (06) ◽  
pp. 759-788 ◽  
Author(s):  
F. JOCHMANN
Keyword(s):  
Weak Solution ◽  
Viscosity Solutions ◽  
Hydrodynamic Model ◽  
Global Weak Solution ◽  
Limit Problem ◽  
Young Measures ◽  
P System ◽  
Compensated Compactness ◽  
One Dimensional ◽  
The One

The existence of a global weak solution of the one-dimensional hydrodynamic model for semiconductors is proved by the method of artificial viscosity and the theory of compensated compactness. The system is first regularized and global viscosity-solutions are constructed. Letting the viscosity-parameter tend to zero, we obtain a sequence of viscosity-solutions converging in L∞-weak* to a weak solution of the one-dimensional p-system from isoentropic gas dynamics with an electric field term and momentum relaxation. Since the equations are nonlinear and the convergence is only weak, the theory of Young-measures and compensated compactness is applied to obtain a weak solution of the limit problem.

Initial layer and incompressible limit for Euler–Poisson equation in nonthermal plasma

2019 ◽  
Vol 29 (09) ◽  
pp. 1733-1751
Author(s):  
Tao Luo ◽  
Shu Wang ◽  
Yan-Lin Wang
Keyword(s):  
Asymptotic Expansion ◽  
Poisson Equation ◽  
Nonthermal Plasma ◽  
Approximate Solutions ◽  
Singular Limit ◽  
Incompressible Limit ◽  
Incompressible Euler Equation ◽  
Initial Layer ◽  
Compressible Euler ◽  
Incompressible Euler

The singular limit from compressible Euler–Poisson equation in nonthermal plasma to incompressible Euler equation with an ill-prepared initial data is investigated in this paper by constructing approximate solutions of the appropriate order via an asymptotic expansion. Nonlinear asymptotic stability of initial layer approximation is established with the convergence rate.

Incompressible limit for the two-dimensional isentropic Euler system with critical initial data

2014 ◽  
Vol 144 (6) ◽  
pp. 1127-1154 ◽  
Author(s):  
Taoufik Hmidi ◽  
Samira Sulaiman
Keyword(s):  
Mach Number ◽  
Initial Data ◽  
Euler System ◽  
Incompressible Limit ◽  
Two Dimensional ◽  
Low Mach Number ◽  
Low Mach Number Limit ◽  
Critical Besov Space ◽  
Convergence Results ◽  
Incompressible Euler

We study the low-Mach-number limit for the two-dimensional isentropic Euler system with ill-prepared initial data belonging to the critical Besov space . By combining Strichartz estimates with the special structure of the vorticity, we prove that the lifespan of the solutions goes to infinity as the Mach number goes to zero. We also prove strong convergence results of the incompressible parts to the solution of the incompressible Euler system.

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