Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Sébastien Galtier"'
Publikováno v:
Universe, Vol 6, Iss 7, p 98 (2020)
It is widely accepted that the primordial universe experienced a brief period of accelerated expansion called inflation. This scenario provides a plausible solution to the horizon and flatness problems. However, the particle physics mechanism respons
Externí odkaz:
https://doaj.org/article/a94c78955ccd4bfe98b8bca5b83a770b
Publikováno v:
Physical Review X, Vol 8, Iss 3, p 031066 (2018)
We report a numerical investigation of three-dimensional, incompressible, Hall magnetohydrodynamic turbulence with a relatively strong mean magnetic field. Using helicity decomposition and cross-bicoherence analysis, we observe that the resonant thre
Externí odkaz:
https://doaj.org/article/59264c62d1804fe39d1044831d6a40b0
Autor:
Sébastien Galtier
An analytical theory of wave turbulence is developed for pure compressible magnetohydrodynamics in the small $\beta$ limit. In contrast to previous works where the multiple scale method was not mentioned and slow magneto-acoustic waves were included,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3f5fa17b9796907eb4aa47fa20d8299a
http://arxiv.org/abs/2303.00643
http://arxiv.org/abs/2303.00643
Autor:
Vincent David, Sébastien Galtier
Using the theory of wave turbulence for rapidly rotating incompressible fluids derived by Galtier (2003), we find the locality conditions that the solutions of the kinetic equation must satisfy. We show that the exact anisotropic Kolmogorov-Zakharov
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9955429deb9cdfdeb4d93e7260916792
http://arxiv.org/abs/2212.04995
http://arxiv.org/abs/2212.04995
Autor:
Sébastien Galtier
A century ago, Lewis Fry Richardson introduced the concept of energy cascades in turbulence. Since this conceptual breakthrough, turbulence has been studied in diverse systems and our knowledge has increased considerably through theoretical, numerica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb498ad41fe8dae0f64b09efb42b926d
https://doi.org/10.1017/9781009275880
https://doi.org/10.1017/9781009275880
Autor:
Vincent David, Sébastien Galtier
Publikováno v:
Journal of Plasma Physics. 88
A wave turbulence theory is developed for inertial electron magnetohydrodynamics (IEMHD) in the presence of a relatively strong and uniform external magnetic field $\boldsymbol{B_0} = B_0 \hat{\boldsymbol{e}}_\|$. This regime is relevant for scales s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4335bc771f71377e4d592f2bd9b9991d
https://doi.org/10.1017/s0022377822000976
https://doi.org/10.1017/s0022377822000976
Autor:
Sébastien Galtier
Publikováno v:
Geophysical & Astrophysical Fluid Dynamics. 115:234-257
Capillary waves are perhaps the simplest example to consider for an introduction to wave turbulence. Since the first paper by Zakharov and Filonenko, capillary wave turbulence has been the subject ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0943df17a8a35b0602e2d809dc0055f0
https://doi.org/10.1080/03091929.2020.1715966
https://doi.org/10.1080/03091929.2020.1715966
The solar wind is a highly turbulent plasma for which the mean rate of energy transfer $\varepsilon$ has been measured for a long time using the Politano-Pouquet (PP98) exact law. However, this law assumes statistical homogeneity that can be violated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::503d517c6c336f8ac9504d6a59167a3f
Publikováno v:
Physical Review E. 103
The zeroth law is one of the oldest conjecture in turbulence that is still unproven. Here, we consider weak solutions of one-dimensional compressible magnetohydrodynamics and demonstrate that the lack of smoothness of the fields introduces a new diss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94bf2ba642141d698fc01385a9c76258
https://doi.org/10.1103/physreve.103.063217
https://doi.org/10.1103/physreve.103.063217
Publikováno v:
Journal of Plasma Physics
Journal of Plasma Physics, Cambridge University Press (CUP), 2021, 87 (2), ⟨10.1017/S0022377821000374⟩
Journal of Plasma Physics, Cambridge University Press (CUP), 2021, 87 (2), ⟨10.1017/S0022377821000374⟩
Using mixed second-order structure functions, a compact exact law is derived for isothermal compressible Hall magnetohydrodynamic turbulence with the assumptions of statistical homogeneity, time stationarity and infinite kinetic/magnetic Reynolds num
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa459f12cacbdc27a8e98f96928eac8b
https://hal.archives-ouvertes.fr/hal-03334226
https://hal.archives-ouvertes.fr/hal-03334226