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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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15507998_v87_n3_p_PeraltaRamos |
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todo:paper_15507998_v87_n3_p_PeraltaRamos2023-10-03T16:24:47Z Macroscopic approximation to relativistic kinetic theory from a nonlinear closure Peralta-Ramos, J. Calzetta, E. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v87_n3_p_PeraltaRamos |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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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. |
| format |
JOUR |
| author |
Peralta-Ramos, J. Calzetta, E. |
| spellingShingle |
Peralta-Ramos, J. Calzetta, E. Macroscopic approximation to relativistic kinetic theory from a nonlinear closure |
| author_facet |
Peralta-Ramos, J. Calzetta, E. |
| author_sort |
Peralta-Ramos, J. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_15507998_v87_n3_p_PeraltaRamos |
| work_keys_str_mv |
AT peraltaramosj macroscopicapproximationtorelativistickinetictheoryfromanonlinearclosure AT calzettae macroscopicapproximationtorelativistickinetictheoryfromanonlinearclosure |
| _version_ |
1807324138816143360 |