Macroscopic approximation to relativistic kinetic theory from a nonlinear closure

We use a macroscopic description of a system of relativistic particles based on adding a nonequilibrium tensor to the usual hydrodynamic variables. The nonequilibrium tensor is linked to relativistic kinetic theory through a nonlinear closure suggested by the entropy production principle; the evolut...

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Autores principales: Peralta Ramos, Jerónimo, Calzetta, Esteban Adolfo
Publicado: 2013
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v87_n3_p_PeraltaRamos
http://hdl.handle.net/20.500.12110/paper_15507998_v87_n3_p_PeraltaRamos
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_15507998_v87_n3_p_PeraltaRamos2023-06-08T16:22:36Z Macroscopic approximation to relativistic kinetic theory from a nonlinear closure Peralta Ramos, Jerónimo Calzetta, Esteban Adolfo We use a macroscopic description of a system of relativistic particles based on adding a nonequilibrium tensor to the usual hydrodynamic variables. The nonequilibrium tensor is linked to relativistic kinetic theory through a nonlinear closure suggested by the entropy production principle; the evolution equation is obtained by the method of moments and together with energy-momentum conservation closes the system. Transport coefficients are chosen to reproduce second-order fluid dynamics if gradients are small. We compare the resulting formalism to exact solutions of Boltzmann's equation in 0+1 dimensions and show that it tracks kinetic theory better than second-order fluid dynamics. © 2013 American Physical Society. Fil:Peralta-Ramos, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calzetta, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v87_n3_p_PeraltaRamos http://hdl.handle.net/20.500.12110/paper_15507998_v87_n3_p_PeraltaRamos
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We use a macroscopic description of a system of relativistic particles based on adding a nonequilibrium tensor to the usual hydrodynamic variables. The nonequilibrium tensor is linked to relativistic kinetic theory through a nonlinear closure suggested by the entropy production principle; the evolution equation is obtained by the method of moments and together with energy-momentum conservation closes the system. Transport coefficients are chosen to reproduce second-order fluid dynamics if gradients are small. We compare the resulting formalism to exact solutions of Boltzmann's equation in 0+1 dimensions and show that it tracks kinetic theory better than second-order fluid dynamics. © 2013 American Physical Society.
author Peralta Ramos, Jerónimo
Calzetta, Esteban Adolfo
spellingShingle Peralta Ramos, Jerónimo
Calzetta, Esteban Adolfo
Macroscopic approximation to relativistic kinetic theory from a nonlinear closure
author_facet Peralta Ramos, Jerónimo
Calzetta, Esteban Adolfo
author_sort Peralta Ramos, Jerónimo
title Macroscopic approximation to relativistic kinetic theory from a nonlinear closure
title_short Macroscopic approximation to relativistic kinetic theory from a nonlinear closure
title_full Macroscopic approximation to relativistic kinetic theory from a nonlinear closure
title_fullStr Macroscopic approximation to relativistic kinetic theory from a nonlinear closure
title_full_unstemmed Macroscopic approximation to relativistic kinetic theory from a nonlinear closure
title_sort macroscopic approximation to relativistic kinetic theory from a nonlinear closure
publishDate 2013
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v87_n3_p_PeraltaRamos
http://hdl.handle.net/20.500.12110/paper_15507998_v87_n3_p_PeraltaRamos
work_keys_str_mv AT peraltaramosjeronimo macroscopicapproximationtorelativistickinetictheoryfromanonlinearclosure
AT calzettaestebanadolfo macroscopicapproximationtorelativistickinetictheoryfromanonlinearclosure
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