Results 101 to 110 of about 50,604 (268)

Numerical 3+1 general relativistic magnetohydrodynamics: a local characteristic approach

, 2005
We present a general procedure to solve numerically the general relativistic magnetohydrodynamics (GRMHD) equations within the framework of the 3+1 formalism. The work reported here extends our previous investigation in general relativistic hydrodynamics
Blandford R. D., Blandford R. D., Bocquet M., Font J. A., Font J. A., Jose A. Font, Jose A. Pons, Jose M. Ibanez, Jose M. Marti, Juan A. Miralles, Kozlowski M., Luis Anton, Marti J. M., Michel F., Olindo Zanotti, Penrose R., Pons J. A., von Zeipel H., Yokosawa M., Yokosawa M.   +19 more
core   +1 more source

Global Evolution, Energetics, and Origins of Auroral Streamers

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract An auroral streamer—a usually meridionally aligned, arc‐like feature that extend across the auroral oval. We performed a high‐resolution global magnetohydrodynamic simulation to characterize the evolution of streamers and their coupling to magnetotail drivers. The results show that streamers, which are a consequence of magnetotail flow bursts,
Ziyi Yang, Binzheng Zhang, William Lotko, Jiuhou Lei   +3 more
wiley   +1 more source

Field‐Aligned Currents and Auroral Precipitation During the Terrestrial Alfvén Wing State

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract When sub‐Alfvénic (Alfvén Mach number MA< ${\mathrm{M}}_{A}< $1) plasmas impact Earth, Alfvén wings (AWs) develop. A Multiscale Atmosphere Geospace Environment simulation of the April 2023 storm, validated by Active Magnetosphere and Planetary Electrodynamics Response Experiment data, reveals the field‐aligned‐current (FAC) generation ...
B. L. Burkholder, L.‐J. Chen, D. Lin, S. K. Vines, K. A. Sorathia, C. F. Bowers   +5 more
wiley   +1 more source

Solar Nebula Magnetohydrodynamics [PDF]

, 2000
The dynamical state of the solar nebula depends critically upon whether or not the gas is magnetically coupled. The presence of a subthermal field will cause laminar flow to break down into turbulence. Magnetic coupling, in turn, depends upon the ionization fraction of the gas.
Balbus, S, Hawley, J
openaire   +5 more sources

Magnetohydrodynamic experiments on cosmic magnetic fields

, 2008
It is widely known that cosmic magnetic fields, i.e. the fields of planets, stars, and galaxies, are produced by the hydromagnetic dynamo effect in moving electrically conducting fluids.
Alemany, Aubert, Aubert, Avalos-Zuñiga, Babcock, Balbus, Balbus, Balbus, Beck, Berhanu, Bevir, Blackman, Bourgoin, Bourgoin, Braithwaite, Brandenburg, Brandenburg, Brito, Brunhes, Bullard, Busse, Busse, Busse, Busse, Busse, Cardin, Carlson, Chandrasekhar, Christensen, Christensen, Christensen, Christensen, Colgate, Colgate, Colgate, Collins, Connerney, Cowling, Denisov, Dobler, Dormy, Dubrulle, Dudley, Dziourkevitch, Fauve, Fearn, Fischer, Forest, Forest, Frick, Fuchs, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gailitis, Gans, Gekelman, Giesecke, Giesecke, Gissinger, Glassmeier, Glassmeier, Glatzmaier, Govoni, Grasso, Guermond, Hale, Harder, Hawley, Hawley, Herzenberg, Hollerbach, Hollerbach, Hollerbach, Hoyng, Inglis, Iskakov, Ivers, Ji, Ji, Ji, Ji, Ji, Kageyama, Kaiser, Kenjereš, Kenjereš, Kenjereš, Khalzov, Khalzov, Kirillov, Kirko, Kitchatinov, Kivelson, Knobloch, Kono, Kouveliotou, Krasnov, Krechetnikov, Kronberg, Kuang, Kulsrud, Laguerre, Laguerre, Lakhin, Larmor, Lathrop, Laval, Lehnert, Liu, Liu, Liu, Liu, Lord Rayleigh, Lowes, Lowes, Léora, Léorat, Marié, Marié, Marié, Monchaux, Moresco, Morris, Müller, Müller, Müller, Müller, Nakajima, Nataf, Ness, Nornberg, Nornberg, Ogilvie, Ossendrijver, Parker, Peffley, Peffley, Pekeris, Pessah, Pierson, Plunian, Ponomarenko, Priede, Pétrélis, Pétrélis, Pétrélis, Ravelet, Reighard, Rincon, Roach, Roberts, Roberts, Roberts, Roberts, Rädler, Rädler, Rädler, Rädler, Rädler, Rädler, Rüdiger, Rüdiger, Rüdiger, Rüdiger, Schekochihin, Schekochihin, Schmitt, Schrinner, Schrinner, Schultz-Grunow, Shakura, Shew, Siemens, Sisan, Sisan, Southwood, Spence, Spence, Spruit, Steenbeck, Steenbeck, Stefani, Stefani, Stefani, Stefani, Stefani, Stefani, Stefani, Stefani, Stellmach, Stellmach, Stepanov, Stevenson, Stevenson, Stieglitz, Szklarski, Szklarski, Tayler, Tilgner, Tilgner, Tilgner, Tilgner, Tilgner, Tilgner, Turner, Vandakurov, Velikhov, Velikhov, Verma, Volk, Wang, Wendt, Wheatstone, Wicht, Wilkinson, Winterberg, Wosnitza, Xu, Xu, Xu, Zandbergen   +232 more
core   +2 more sources

Formation of the Bubble‐Like Ionospheric Super‐Depletion Structure (BLISS): MAGE Simulation of the September, 2017 Storm

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract This study investigates the formation of a newly identified storm‐time ionospheric phenomenon, the bubble‐like ionospheric super‐depletion structure (BLISS) in F‐region plasma densities. The observed BLISS initiates from the magnetic dip equator in the post‐sunset region and expands westward and poleward, reaching midlatitudes of ∼40°, which ...
Shanshan Bao, Wenbin Wang, Viacheslav Merkin, Frank Toffoletto, Dong Lin, Kareem Sorathia, Kevin Pham, Michael Wiltberger, Haonan Wu   +8 more
wiley   +1 more source

Interplay Between a Foreshock Bubble and a Hot Flow Anomaly Forming Along the Same Rotational Discontinuity

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract Solar wind directional discontinuities can generate transient mesoscale structures such as foreshock bubbles and hot flow anomalies (HFAs) upstream of Earth's bow shock. These structures can have a global impact on near‐Earth space, so understanding their formation conditions is essential.
Lucile Turc, Martin O. Archer, Hongyang Zhou, Yann Pfau‐Kempf, Jonas Suni, Primož Kajdič, Xóchitl Blanco‐Cano, Souhail Dahani, Markus Battarbee, Savvas Raptis, Terry Z. Liu, Hui Zhang, C. Philippe Escoubet, Adrian T. LaMoury, Shi Tao, Veera Lipsanen, Yufei Hao, Minna Palmroth   +17 more
wiley   +1 more source

Passive Advection of a Vector Field by Compressible Turbulent Flow: Renormalizations Group Analysis near d = 4 †

Universe, 2019
The renormalization group approach and the operator product expansion technique are applied to the model of a passively advected vector field by a turbulent velocity field.
Nikolay V. Antonov, Nikolay M. Gulitskiy, Maria M. Kostenko, Tomáš Lučivjanský   +3 more
doaj   +1 more source

Magnetohydrodynamics and Plasma Cosmology

, 2005
We study the linear magnetohydrodynamic (MHD) equations, both in the Newtonian and the general-relativistic limit, as regards a viscous magnetized fluid of finite conductivity and discuss instability criteria.
A. Brandenburg, A.A. Galeev, A.M. Wolfe, Apostolos Kuiroukidis, B. Punsly, C. Hunter, C.G. Tsagas, C.L. Fryer, D.B. Papadopoulos, D.B. Papadopoulos, Demetrios Papadopoulos, E.N. Parker, E.N. Parker, H. Dimmelmeier, J. Adams, J. Carot, J. Jackson, J.D. Barrow, J.D. Jackson, J.V. Narlikar, K. Jedamzik, K.C. Jacobs, K.S. Thorne, Kostas Kleidis, L. Vlahos, Loukas Vlahos, N.A. Krall, P.P. Kronberg, P.P. Kronberg, P.P. Kronberg, R. Durrer, R. Durrer, S. Chandrasekhar, S. Hacyan, S. Weinberg, S.M. Hamberger, S.W. Hawking, T.G. Cowling, T.W. Baumgarte, Ya.B. Zel’dovich   +39 more
core   +1 more source

Stencil Computations on AMD and Nvidia Graphics Processors: Performance and Tuning Strategies

Concurrency and Computation: Practice and Experience, Volume 37, Issue 12-14, 25 June 2025.
ABSTRACT Over the last ten years, graphics processors have become the de facto accelerator for data‐parallel tasks in various branches of high‐performance computing, including machine learning and computational sciences. However, with the recent introduction of AMD‐manufactured graphics processors to the world's fastest supercomputers, tuning ...
Johannes Pekkilä, Oskar Lappi, Fredrik Robertsén, Maarit J. Korpi‐Lagg   +3 more
wiley   +1 more source