Abstract
Extended thermodynamics (ET) developed up to now fails when a gas is very dense and is composed of molecules with small internal degrees of freedom because the condition of convexity (stability) is violated. The aim of this paper is to explore a possible approach to construct an ET theory that is valid for any dense gas with the condition that it reduces to the usual ET theory when a gas is sufficiently rarefied. We restrict our study, for simplicity, within the simplest case in which the dissipation is only due to the dynamic pressure. Therefore the basic system of equations is the simplest variant of the Euler system, that is, the system composed of the equations for the conservation laws and an equation for the dynamic pressure (6-field theory).
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Acknowledgments
This work was supported by National Group of Mathematical Physics GNFM-INdAM (M.C.C., S.P. and T.R.) and by University of Bologna: FARB 2012 Project Extended Thermodynamics of Non-Equilibrium Processes from Macro- to Nano-Scale (T. R.) and by Japan Society of Promotion of Science (JSPS) No. 25390150 (M.S.).
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Communicated by Salvatore Rionero.
To the memory of Prof. Carlo Ciliberto.
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Carrisi, M.C., Pennisi, S., Ruggeri, T. et al. Extended thermodynamics of dense gases in the presence of dynamic pressure. Ricerche mat. 64, 403–419 (2015). https://doi.org/10.1007/s11587-015-0247-7
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DOI: https://doi.org/10.1007/s11587-015-0247-7