Ionizing shocks in argon. Part II: Transient and multi-dimensional effects

Kapper, M. G.; Cambier, Jean-Luc

doi:10.1063/1.3585694

Cited by 37 publications

(20 citation statements)

References 12 publications

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“…(12), which corresponds to the relative mean kinetic energy. For convenience, we also define an equivalent drift temperature T w = λT 33 , such that all the rates can be tabulated in terms of two temperatures.…”

Section: A Reaction Ratesmentioning

confidence: 99%

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Modeling of inelastic collisions in a multifluid plasma: Excitation and deexcitation

Cambier

2015

Physics of Plasmas

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We describe here a model for inelastic collisions for electronic excitation and deexcitation processes in a general, multifluid plasma. The model is derived from kinetic theory, and applicable to any mixture and mass ratio. The principle of detailed balance is strictly enforced, and the model is consistent with all asymptotic limits. The results are verified with direct Monte Carlo calculations, and various numerical tests are conducted for the case of an electron-hydrogen two-fluid system, using a generic, semi-classical model of collision cross sections. We find that in some cases, the contribution of inelastic collisions to the momentum and thermal resistance coefficients is not negligible, in contrast to the assumptions of current multifluid models. This fundamental model is also applied to ionization and recombination processes, the studies on which are currently underway.

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Section: A Reaction Ratesmentioning

confidence: 99%

“…The current state of the art for modeling detailed chemical kinetics of a low temperature plasma is the collisionalradiative (CR) model, first proposed by Bates et al in 1962 6,7 . CR models are now commonly used in studies of plasma discharge, plasma-assisted combustion, and hypersonics [8][9][10][11][12][13] . The…”

Section: Introductionmentioning

confidence: 99%

Modeling of inelastic collisions in a multifluid plasma: Excitation and deexcitation

Cambier

2015

Physics of Plasmas

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“…In adidition, the governing equations also need to be extended to characterize the thermal non-equilibrium environment of the plasma. Given that the physics has been well established [7,8,3], the extension is certainly achievable.…”

Section: Discussionmentioning

confidence: 99%

Development of a Flow Solver with Complex Kinetics on the Graphic Processing Units

Cambier

2012

50th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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The current paper reports on the implementation of a numerical solver on the Graphic Processing Units (GPU) to model reactive gas mixture with detailed chemical kinetics. The solver incorporates high-order finite volume methods for solving the fluid dynamical equations coupled with stiff source terms. The chemical kinetics are solved implicitly via an operatorsplitting method. We explored different approaches in implementing a fast kinetics solver on the GPU. The detail of the implementation is discussed in the paper. The solver is tested with two high-order shock capturing schemes: MP5 [11] and ADERWENO [12]. Considering only the fluid dynamics calculation, the speed-up factors obtained are 30 for the MP5 scheme and 55 for ADERWENO scheme. For the fully-coupled solver, the performance gain depended on the size of the reaction mechanism. Two different examples of chemistry were explored. The first mechanism consisted of 9 species and 38 reactions, resulting in a speed-up factor up to 35. The second, larger mechanism consisted of 36 species and 308 reactions, resulting in a speed-up factor of up to 40.

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“…Fair agreement is found between the simulation results and experimental data. Kapper 164and Cambier[11] have shown that the fluctuations of the shock structure observed experimentally165 can be reproduced by means of unsteady numerical simulations and explained on the basis of the 166 coupling of the nonlinear kinetics of the CR model with wave propagation within the induction zone.167…”

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confidence: 99%

Reduced-order kinetic plasma models using principal component analysis: Model formulation and manifold sensitivity

et al. 2017

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Plasma flows involve hundreds of species and thousands of reactions at different time scales, resulting in a very large set of governing equations to solve. Simulating large reacting systems in nonequilibrium plasma mixtures remains a challenge with the currently available computational resources. Principal component analysis (PCA) offers a general and rather simple and automated method to reduce large kinetic mechanisms by principal variable selection. This work shows how to adapt and apply the PCA-scores technique, which has its origin in the combustion field, to a collisional-radiative model. We have successfully applied this technique to argon plasmas, reducing the set of governing equations by more than 90%, leading to an important speed-up of the calculation and a reduction of computational cost. 11 12 13 14 15 16

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Ionizing shocks in argon. Part II: Transient and multi-dimensional effects

Abstract: Generation of magnetic field and electrostatic shock wave driven by counterstreaming pair plasmas Phys. Plasmas 10, 392 (2003); 10.1063/1.1540095Modeling argon inductively coupled plasmas: The electron energy distribution function and metastable kinetics

Cited by 37 publications

References 12 publications

Modeling of inelastic collisions in a multifluid plasma: Excitation and deexcitation

Modeling of inelastic collisions in a multifluid plasma: Excitation and deexcitation

Development of a Flow Solver with Complex Kinetics on the Graphic Processing Units

Reduced-order kinetic plasma models using principal component analysis: Model formulation and manifold sensitivity

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