Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Cristian Lalescu"'
We present an analysis of the Navier-Stokes equations based on a spatial filtering technique to elucidate the multi-scale nature of fully developed turbulence. In particular, the advection of a band-pass-filtered small-scale contribution by larger sc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95928fbfe8a379705ab991993749b868
http://arxiv.org/abs/2307.11195
http://arxiv.org/abs/2307.11195
Publikováno v:
Nature Communications
Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019)
Nature Communications, Vol 10, Iss 1, Pp 1-8 (2019)
Particles in turbulence frequently encounter extreme accelerations between extended periods of quiescence. The occurrence of extreme events is closely related to the intermittent spatial distribution of intense flow structures such as vorticity filam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa313befbe9fdcc365eeb74865a758e0
https://doi.org/10.1038/s41467-019-11060-9
https://doi.org/10.1038/s41467-019-11060-9
We investigate sources of systematic error (bias) in acceleration statistics derived from Lagrangian particle tracking data and demonstrate techniques to eliminate or minimise these bias errors introduced during processing. Numerical simulations of p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::360c2eec235e4b4748387f604c0f559f
http://arxiv.org/abs/1805.12440
http://arxiv.org/abs/1805.12440
Autor:
Michael Wilczek, Cristian Lalescu
On their roller coaster ride through turbulence, tracer particles sample the fluctuations of the underlying fields in space and time. Quantitatively relating particle and field statistics remains a fundamental challenge in a large variety of turbulen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d080b917005d35ce310e1248e91be52
http://arxiv.org/abs/1706.02870
http://arxiv.org/abs/1706.02870
Autor:
Kai Bürger, Charles Meneveau, Hussein Aluie, Gregory L. Eyink, Randal Burns, Ethan T. Vishniac, Cristian Lalescu, Alexander S. Szalay, Kalin Kanov
Publikováno v:
Nature. 497:466-469
A magnetohydrodynamic simulation of a magnetized plasma at high conductivity shows that, whereas the magnetic flux can be considered ‘frozen’ into the medium for laminar flow, in a turbulent medium the motion of the field lines can become indeter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe909eb4948db789d8de4e83786f5c59
https://doi.org/10.1038/nature12128
https://doi.org/10.1038/nature12128
Publikováno v:
Journal of Computational Physics. 241:546-557
A class of numerical schemes is developed for the study of charged particle transport in complex stationary electromagnetic fields and tested for fields obtained from a numerical solution of the magneto-hydrodynamic equation. The performances of thes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::70cba546eb45ddd58d3db05a74902313
https://doi.org/10.1016/j.jcp.2011.10.011
https://doi.org/10.1016/j.jcp.2011.10.011
Implementation of high order spline interpolations for tracking test particles in discretized fields
Publikováno v:
Journal of Computational Physics. 229:5862-5869
A systematic approach for constructing high order spline interpolation methods is proposed for fields known on regular, rectangular grids. These interpolation methods are tested in tracking trajectories of particles submitted to a force that derives
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cb780536ac20bccea7d5724b904f7c8
https://doi.org/10.1016/j.jcp.2009.10.046
https://doi.org/10.1016/j.jcp.2009.10.046
Autor:
Yi Kang Shi, Gregory L. Eyink, Alex Lazarian, Cristian Lalescu, Ethan T. Vishniac, Theodore D. Drivas
Publikováno v:
Physical Review Letters. 115
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed9f61b060a72c7be38a053cdd7dff7e
https://doi.org/10.1103/physrevlett.115.059901
https://doi.org/10.1103/physrevlett.115.059901
Autor:
Theodore D. Drivas, Alex Lazarian, Gregory L. Eyink, Yi-Kang Shi, Cristian Lalescu, Ethan T. Vishniac
In situ spacecraft data on the solar wind show events identified as magnetic reconnection with wide outflows and extended "X lines," 10(3)-10(4) times ion scales. To understand the role of turbulence at these scales, we make a case study of an inerti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e90443a026025f185f2fb8f6e87cf30
http://arxiv.org/abs/1503.00509
http://arxiv.org/abs/1503.00509
Publikováno v:
Physical review letters. 110(8)
We investigate chaos synchronization of small-scale motions in the three-dimensional turbulent energy cascade, via pseudo-spectral simulations of the incompressible Navier-Stokes equations. The modes of the turbulent velocity field below about 20 Kol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab4d1adbf42555410c48f00bf8cbd1fc
https://pubmed.ncbi.nlm.nih.gov/23473150
https://pubmed.ncbi.nlm.nih.gov/23473150