Ponencia
Heat Flux in a Granular Gas
Autor/es | Brey Abalo, José Javier
Ruiz Montero, María José |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2012 |
Fecha de depósito | 2020-07-13 |
Publicado en |
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ISBN/ISSN | 0094-243X (impreso) 1551-7616 (electrónico) |
Resumen | A peculiarity of the hydrodynamic Navier-Stokes equations for a granular gas is the modification of the Fourier law, with the presence of an additional contribution to the heat flux that is proportional to the density ... A peculiarity of the hydrodynamic Navier-Stokes equations for a granular gas is the modification of the Fourier law, with the presence of an additional contribution to the heat flux that is proportional to the density gradient. Consequently, the constitutive relation involves, in the case of a one-component granular gas, two transport coefficients: the usual ( thermal) heat conductivity and a diffusive heat conductivity. A very simple physical interpretation of this effect, in terms of the mean free path and the mean free time is provided. It leads to the modified Fourier law with an expression for the diffusive Fourier coefficient that differs in a factor of the order of unity from the expression obtained by means of the inelastic Boltzmann equation. Also, some aspects of the Chapman-Enskog computation of the new transport coefficients as well as of the comparison between simulation results and theory are discussed. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España |
Identificador del proyecto | FIS2011-24460 |
Cita | Brey Abalo, J.J. y Ruiz Montero, M.J. (2012). Heat Flux in a Granular Gas. En 28th International Symposium on Rarefied Gas Dynamics (RGD) (961-970), Zaragoza, (España): AIP Publishing. |
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