Mostrar el registro sencillo del ítem
dc.contributor.author
Dmitruk, Pablo Ariel
dc.contributor.author
Matthaeus, W. H.
dc.date.available
2018-09-24T18:00:27Z
dc.date.issued
2009-12
dc.identifier.citation
Dmitruk, Pablo Ariel; Matthaeus, W. H.; Waves and turbulence in magnetohydrodynamic direct numerical simulations; American Institute of Physics; Physics Of Plasmas; 16; 6; 12-2009; 623041-623049
dc.identifier.issn
1070-664X
dc.identifier.uri
http://hdl.handle.net/11336/60767
dc.description.abstract
Direct numerical simulations of the incompressible MHD equations with a uniform background magnetic field in a turbulent regime are performed to assess the relative importance of broadband turbulent fluctuations and wavelike fluctuations that are associated with an Alfv́n wave dispersion relation. The focus is on properties of the fluctuations in the frequency domain. Eulerian frequency spectra and individual wave number mode frequency spectra show the presence of peaks at the corresponding Alfv́n wave frequencies for full nonlinear simulations in a turbulent regime. The peaks are however broad and their power content is compared to the power in the full spectrum as well as a signal to noise ratio is defined and quantified for different values of the background magnetic field. The ratio of power in Alfv́n waves to the power in the rest of the spectrum is also quantified and is found to be small for different values of the mean magnetic field. Individual modes in time show a much more complex behavior than that could be expected for linear solutions. Also, nonlinear transfer of energy is evidenced by the existence of peaks at wave numbers perpendicular to the mean magnetic field. Implications are discussed for theories of strong turbulence as well as perturbation theories that assume the leading order behavior is that of propagating Alfv́n waves. © 2009 American Institute of Physics.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Institute of Physics
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Magnetohydrodynamic
dc.subject
Turbulence
dc.subject
Waves
dc.subject
Numerical Simulation
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Waves and turbulence in magnetohydrodynamic direct numerical simulations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-09-24T14:33:02Z
dc.journal.volume
16
dc.journal.number
6
dc.journal.pagination
623041-623049
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Dmitruk, Pablo Ariel. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
dc.description.fil
Fil: Matthaeus, W. H.. Bartol Research Institute; Estados Unidos
dc.journal.title
Physics Of Plasmas
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1063/1.3148335
Archivos asociados