Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Jürgen Dreher"'
Electrostatic Bursts Generated by the Ion–Ion Acoustic Instability with Solar Wind Plasma Parameters
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 93 (2024)
This study is motivated by recent observations from the Parker Solar Probe (PSP) mission, which have been identified as ion-acoustic waves from 15 to 25 solar radii. These observations reveal characteristic sequences of narrowband, high-frequency bur
Externí odkaz:
https://doaj.org/article/91f920bf217c40b9a29fc1e6598f0c4f
Autor:
Jürgen Dreher, Claudia Dehne
Publikováno v:
Die Corona-Transformation ISBN: 9783658339920
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fab0ed9bf5be72a2d356b87a04ec6714
https://doi.org/10.1007/978-3-658-33993-7_16
https://doi.org/10.1007/978-3-658-33993-7_16
Publikováno v:
Applied Mathematics and Computation. 272:460-478
We present a WENO finite volume method for the approximation of hyperbolic conservation laws on adaptively refined Cartesian grids.On each single patch of the AMR grid, we use a modified dimension-by-dimension WENO method, which was recently develope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::648ae22860653fa9f89ff3d27943ad1c
https://doi.org/10.1016/j.amc.2015.03.078
https://doi.org/10.1016/j.amc.2015.03.078
Publikováno v:
Springer Proceedings in Mathematics & Statistics ISBN: 9783319915449
We give a brief review of our recently proposed WENO finite volume method for Cartesian grids (Buchmuller, Helzel, J Sci Comput, 61:343–368, 2014, [3]), (Buchmuller et al. Appl Math Comput, 272:460–478, 2016, [4]), which increases the accuracy of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ce0d1a7732a853dba5aeddfad50fc7d
https://doi.org/10.1007/978-3-319-91545-6_21
https://doi.org/10.1007/978-3-319-91545-6_21
Publikováno v:
Physics Letters A. 374:1039-1042
Turbulent density fluctuations in isothermal highly compressible turbulent flows are highly clumped and can be quantified by the scaling properties of powers of the mass distribution. This Eulerian quantity can be related to Lagrangian properties of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2748aeff34f3a0930413658e7251bad
https://doi.org/10.1016/j.physleta.2009.12.036
https://doi.org/10.1016/j.physleta.2009.12.036
Publikováno v:
Physics Letters A. 372:3037-3041
We report on probability-density-functions (PDF) of the mass density in numerical simulations of highly compressible hydrodynamic flows and the corresponding structure formation of Lagrangian particles advected by the flows. Numerical simulations wer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::165d2c11f25e21613e574e711bee9f4a
https://doi.org/10.1016/j.physleta.2008.01.009
https://doi.org/10.1016/j.physleta.2008.01.009
Publikováno v:
Physica Scripta. 72:451-455
Spontaneous development of shock-like singularities in axisymmetric solutions of the Hall-MHD equations is discussed. It is shown that the Hall-term in Ohm's law leads to a Burgers-type equation for the magnetic field evolution in weakly compressible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a23f21d78eeecc09731546330ccf4c8
https://doi.org/10.1088/0031-8949/72/6/004
https://doi.org/10.1088/0031-8949/72/6/004
Autor:
Jürgen Dreher
Publikováno v:
Physica Scripta. :46-49
Two-dimensional magneto-hydrodynamic (MHD) simulations are carried out to study magnetic reconnection in a configuration that is characterized by six current sheets extending radially from the z-axis. In the initial configuration, the current density
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b89dbadd609a952cf3097624fad7285d
https://doi.org/10.1088/0031-8949/1998/t74/008
https://doi.org/10.1088/0031-8949/1998/t74/008
Publikováno v:
Advances in Space Research. 22:1369-1372
We study the dynamics of the ionospheric current system by means of computational simulations. The initial configuration for the simulations represents numerical solutions of a stationary two-dimensional fluid model that focuses on the closure of one
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f50fab35edf0597b4a1d96511ccff7b1
https://doi.org/10.1016/s0273-1177(98)80037-9
https://doi.org/10.1016/s0273-1177(98)80037-9
Publikováno v:
Advances in Space Research. 19:1861-1864
The interaction phase of the Converging Flux Model (Priest et al. , 1994) for the formation of coronal X-ray bright points is investigated self-consistently by means of magnetohydrodynamical simulations. In these simulations the three-dimensional dyn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6da64f7872ee536f32bde45a2c6147ae
https://doi.org/10.1016/s0273-1177(97)00088-4
https://doi.org/10.1016/s0273-1177(97)00088-4