Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Gilberto Medeiros Kremer"'
Autor:
Gilberto Medeiros Kremer
Publikováno v:
Universe, Vol 8, Iss 3, p 179 (2022)
The post-Newtonian Jeans equation for stationary self-gravitating systems is derived from the post-Newtonian Boltzmann equation in spherical coordinates. The Jeans equation is coupled with the three Poisson equations from the post-Newtonian theory. T
Externí odkaz:
https://doaj.org/article/cc60fd7d36534e7195ea7ea921ed897f
This book introduces and develops post-Newtonian kinetic and phenomenological theories in a self-contained manner. The starting point for phenomenological theory is Einstein's field equations from which the first and second post-Newtonian approximati
Autor:
Gilberto Medeiros Kremer
Publikováno v:
Brazilian Journal of Physics. 53
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5b670c46094bd6312500ff63954c3c6
https://doi.org/10.1007/s13538-022-01235-z
https://doi.org/10.1007/s13538-022-01235-z
Autor:
Gilberto Medeiros Kremer
Publikováno v:
International Journal of Geometric Methods in Modern Physics. 20
The second post-Newtonian hydrodynamic equations are analyzed within the framework of a plane wave solution. The hydrodynamic equations for the mass and momentum density are coupled with six Poisson equations for the Newtonian and post-Newtonian grav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::769cca767cac0fe325a95e2e22fbc379
https://doi.org/10.1142/s0219887823500391
https://doi.org/10.1142/s0219887823500391
Autor:
Gilberto Medeiros Kremer
Publikováno v:
Annals of Physics. 452:169284
The non-equilibrium contributions to the post-Newtonian hydrodynamic equations are determined from a relaxation-time model of the post-Newtonian Boltzmann equation. The Chapman-Enskog method is used to calculate the non-equilibrium distribution funct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1733989343003d2f452b3ee0305e978d
https://doi.org/10.1016/j.aop.2023.169284
https://doi.org/10.1016/j.aop.2023.169284
Autor:
Gilberto Medeiros Kremer
Publikováno v:
International Journal of Modern Physics D. 31
Jeans instability is analysed in an expanding universe within the framework of BGK model of the Boltzmann equation and Poisson equations. The background is characterized by a comoving Maxwellian distribution function and a space-time Newtonian gravit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60c7148a64589dc86444e990451b72e6
https://doi.org/10.1142/s0218271822500420
https://doi.org/10.1142/s0218271822500420
The most widely used model for granular gases is perhaps the inelastic hard-sphere model (IHSM), where the grains are assumed to be perfectly smooth spheres colliding with a constant coefficient of normal restitution. A much more tractable model is t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e35dcf1528622c22bc42b13c41999c6b
Autor:
Gilberto Medeiros Kremer
Publikováno v:
An Introduction to the Boltzmann Equation and Transport Processes in Gases ISBN: 9783642116957
One of the main objectives of the kinetic theory is to describe the macroscopic properties of gases—such as pressure, temperature, thermal conductivity, viscosity, diffusion, etc.—from microscopic quantities that are associated with the molecules
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e52338da37e51ba72cce2a4eb2bb3a0
https://doi.org/10.1007/978-3-642-11696-4_1
https://doi.org/10.1007/978-3-642-11696-4_1
Autor:
Gilberto Medeiros Kremer
Publikováno v:
An Introduction to the Boltzmann Equation and Transport Processes in Gases ISBN: 9783642116957
Consider a monatomic gas with N molecules enclosed in a recipient of volume V. One molecule of this gas can be specified at a given time by its position x = (x1,x2,x3) and velocity c = (c1,c2,c3). Hence, a molecule can be specified as a point in a si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::822f51d94116aa4fe532980879db80b8
https://doi.org/10.1007/978-3-642-11696-4_2
https://doi.org/10.1007/978-3-642-11696-4_2
Autor:
Gilberto Medeiros Kremer
Publikováno v:
Interaction of Mechanics and Mathematics ISBN: 9783642116957
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd5915b716d2d561009b6fbfad5977e0
https://doi.org/10.1007/978-3-642-11696-4
https://doi.org/10.1007/978-3-642-11696-4