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51.
Z.J. Wang Krzysztof Fidkowski Rémi Abgrall Francesco Bassi Doru Caraeni Andrew Cary Herman Deconinck Ralf Hartmann Koen Hillewaert H.T. Huynh Norbert Kroll Georg May Per‐Olof Persson Bram van Leer Miguel Visbal 《国际流体数值方法杂志》2013,72(8):811-845
After several years of planning, the 1st International Workshop on High‐Order CFD Methods was successfully held in Nashville, Tennessee, on January 7–8, 2012, just before the 50th Aerospace Sciences Meeting. The American Institute of Aeronautics and Astronautics, the Air Force Office of Scientific Research, and the German Aerospace Center provided much needed support, financial and moral. Over 70 participants from all over the world across the research spectrum of academia, government labs, and private industry attended the workshop. Many exciting results were presented. In this review article, the main motivation and major findings from the workshop are described. Pacing items requiring further effort are presented. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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We consider the dynamical stability of periodic and quasiperiodic stationary solutions of integrable equations with 2 2 Lax pairs. We construct the eigenfunctions and hence the Floquet discriminant for such Lax pairs. The boundedness of the eigenfunctions determines the Lax spectrum. We use the squared eigenfunction connection between the Lax spectrum and the stability spectrum to show that the subset of the real line that gives rise to stable eigenvalues is contained in the Lax spectrum. For non-self-adjoint members of the AKNS hierarchy admitting a common reduction, the real line is always part of the Lax spectrum and it maps to stable eigenvalues of the stability problem. We demonstrate our methods work for a variety of examples, both in and not in the AKNS hierarchy. 相似文献
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Pedro Maciel Thomas Nierhaus Steven Van Damme Heidi Van Parys Johan Deconinck Annick Hubin 《Electrochemistry communications》2009,11(4):875-877
A new model for gas evolving electrodes is proposed, in which the gas evolution reaction is driven by the supersaturation of dissolved gas. 相似文献
55.
Multidimensional upwind residual distribution (RD) schemes have become an appealing alternative to more widespread finite volume and finite element methods (FEM) for solving compressible fluid flows. The RD approach allows to construct nonlinear second order and non-oscillatory methods at the same time. They are routinely used for steady state calculations of the complex flow problems, e.g., 3D turbulent transonic industrial-type simulations [H. Deconinck, K. Sermeus, R. Abgrall, Status of multidimensional upwind residual distribution schemes and applications in aeronautics, AAIA Paper 2000-2328, AIAA, 2000; K. Sermeus, H. Deconinck, Drag prediction validation of a multi-dimensional upwind solver, CFD-based aircraft drag prediction and reduction, VKI Lecture Series 2003-02, Von Karman Institute for Fluid Dynamics, Chausée do Waterloo 72, B-1640 Rhode Saint Genèse, Belgium, 2003]. 相似文献
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Flora Tomasoni Heidi van Parys Herman Terryn Annick Hubin Johan Deconinck Jean-Marie Buchlin Jeroen van Beeck 《Electrochemistry communications》2010,12(1):156-159
Bubble evolution during AC-graining is analysed in combination with the variation of the anodic peaks of the potential and the electrode surface morphology. Aluminium samples are grained in hydrochloric acid in an Inverted Rotating Disk Electrode. A roughness tester is used to characterise the electrode surface, while shadow imaging is applied to determine the bubble size distribution. An interpretation of the correlation existing among bubble size, potential peaks evolution, surface properties and smut layer formation is proposed, which provides insights into the mechanisms involved in bubble formation. 相似文献
57.
D. E. Pelinovsky E. A. Rouvinskaya O. E. Kurkina B. Deconinck 《Theoretical and Mathematical Physics》2014,179(1):452-461
We prove that line solitons of the two-dimensional hyperbolic nonlinear Schrödinger equation are unstable under transverse perturbations of arbitrarily small periods, i.e., short waves. The analysis is based on the construction of Jost functions for the continuous spectrum of Schrödinger operators, the Sommerfeld radiation conditions, and the Lyapunov-Schmidt decomposition. We derive precise asymptotic expressions for the instability growth rate in the limit of short periods. 相似文献
58.
The Bernoulli boundary condition for traveling water waves is obtained from Euler’s equation for inviscid flow by employing two key reductions: (i) the traveling wave assumption, (ii) the introduction of a velocity potential. Depending on the order of these reductions, the Bernoulli boundary condition may or may not contain an arbitrary constant. This note shows the equivalence of the two formulations. Further, we arrive at a physical interpretation for the Bernoulli constant, namely, that it is associated with an average current. Last, we show that the Bernoulli constant and the average current cannot simultaneously be zero for non-trivial traveling waves. 相似文献
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