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On Coulomb collisions in bi-Maxwellian plasmas
Posted on May 19th, 2009 No commentsPetr Hellinger and Pavel M. TravniCek<br/> Collisional momentum and energy transport in bi-Maxwellian plasmas with a drift velocity along the ambient magnetic field are calculated from both the FokkerPlanck and Boltzmann integral approximations. The transport coefficients obtained from the two approaches are identical to the leading order (p … [Phys. Plasmas 16, 054501 (2009)] published Mon May 18, 2009.
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Plasma rotation driven by static nonresonant magnetic fields
Posted on May 19th, 2009 No commentsA. M. Garofalo, W. M. Solomon, M. Lanctot, K. H. Burrell, J. C. DeBoo et al.<br/> Recent experiments in high temperature DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 64 (2002)] plasmas reported the first observation of plasma acceleration driven by the application of static nonresonant magnetic fields (NRMFs), with resulting improvement in the global energy confinement time. Alt … [Phys. Plasmas 16, 056119 (2009)] published Mon May 18, 2009.
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Nonlinear dust-acoustic waves in a strongly coupled dusty plasma with vortexlike ion distribution
Posted on May 19th, 2009 No commentsM. G. M. Anowar, M. S. Rahman, and A. A. Mamun<br/> The nonlinear features of dust-acoustic (DA) wave mechanicss in a strongly coupled unmagnetized dusty plasma (containing electrons following Boltzmann distribution, ions obeying vortexlike distribution, and negatively charged mobile dust) are investigated by using reductive perturbation method. It is observed … [Phys. Plasmas 16, 053704 (2009)] published Mon May 18, 2009.
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Development and validation of a predictive model for the pedestal height
Posted on May 19th, 2009 No commentsP. B. Snyder, R. J. Groebner, A. W. Leonard, T. H. Osborne, and H. R. Wilson<br/> The pressure at the top of the edge transport barrier (or pedestal height) strongly impacts tokamak fusion performance. Predicting the pedestal height in future devices such as ITER [ITER physics theory Basis Editors, Nucl. Fusion 39, 2137 (1999)] remains an important challenge. While uncertainties remain, … [Phys. Plasmas 16, 056118 (2009)] published Mon May 18, 2009.
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Effects of varying magnetosheath flow and dissipation on the two-dimensional reconnection structure at the magnetopause
Posted on May 19th, 2009 No commentsLars G. Westerberg, Hans O. Akerstedt, and J. Henric Taavola<br/> The stationary Riemann problem including dissipation in form of resistivity and viscosity for the reconnection structure at the dayside magnetopause is considered. Including tangential velocity shear and gradients across the complete reconnection structure from the magnetosheath side into the magnet … [Phys. Plasmas 16, 052902 (2009)] published Mon May 18, 2009.
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Drag and flow reversal in mixed convection past a heated sphere
Posted on May 19th, 2009 No commentsMiroslav KotouC, Gilles Bouchet, and Jan Dusek<br/> Axisymmetric simulation of mixed convection past a heated sphere presented in a recent paper of Mograbi and Bar-Ziv [J. Aerosol Sci. 36, 387 (2005)] reveals a huge recirculation in the opposing flow configuration at very small Reynolds numbers and at Richardson numbers exceeding unity, the size of w … [Phys. Fluids 21, 054104 (2009)] published Mon May 18, 2009.
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Nonlinear regimes of anticonvection, thermocapillarity, and RayleighBenard convection in two-layer systems
Posted on May 19th, 2009 No commentsIlya B. Simanovskii, Antonio Viviani, Frank Dubois, and JeanClaude Legros<br/> The nonlinear regimes of anticonvection and RayleighBenard convection in a two-layer system with periodic boundary conditions on lateral walls in the presence of the interfacial heat release are studied. The region where anticonvective and the RayleighBenard instability mechanisms act simultaneously … [Phys. Fluids 21, 052106 (2009)] published Mon May 18, 2009.
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Chaotic mixing in electro-osmotic flows driven by spatiotemporal surface charge modulation
Posted on May 19th, 2009 No commentsChih-Chang Chang and Ruey-Jen Yang<br/> This paper presents an investigation into chaotic mixing in an electro-osmotic flow through a microchannel. In the mixing system, the continuous throughput flow has the form of a pluglike electro-osmotic flow induced by a permanent surface charge on the wall surface, while electro-osmotic flows cont … [Phys. Fluids 21, 052004 (2009)] published Mon May 18, 2009.
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A new thermodynamic framework for second-grade Korteweg-type viscous fluids
Posted on May 19th, 2009 No commentsV. A. Cimmelli, A. Sellitto, and V. Triani<br/> A model of viscous fluid of Korteweg type, with first-order nonlocal constitutive equations, is developed. The restrictions placed by the dissipation principle are investigated by applying a generalized Liu procedure. Some remarkable nonlocal properties of the entropy function are carried out. … [J. Math. Phys. 50, 053101 (2009)] published Tue May 19, 2009.
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Three dimensional quantum geometry and deformed symmetry
Posted on May 19th, 2009 No commentsE. Joung, J. Mourad, and K. Noui<br/> We study a three dimensional noncommutative space emerging in the context of three dimensional Euclidean quantum gravity. Our starting point is the assumption that the isometry group is deformed to the Drinfeld double [script D](SU(2)). We generalize to the deformed case the construction of [openfac ... [J. Math. Phys. 50, 052503 (2009)] published Tue May 19, 2009.