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Continuum Mechanics and Thermodynamics

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19.05.2020 | Original Article

Shock structure in extended thermodynamics with second-order maximum entropy principle closure

verfasst von: Andrea Mentrelli, Tommaso Ruggeri

Erschienen in: Continuum Mechanics and Thermodynamics | Ausgabe 1/2021

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Abstract

An investigation on the features of the shock structure solution of the 13-moment system of extended thermodynamics with a second-order closure based on the maximum entropy principle is presented. The results are compared to those obtained by means of the traditional first-order closure and to those obtained in the framework of kinetic theory by solving the Boltzmann equation with a BGK model for the collision term. It is seen that when adopting a second-order closure, the strength of the subshock that appears in the shock structure profile for large enough Mach numbers is remarkably reduced with respect to what is found with the first-order closure, and the overall profile of the shock structure solution is in better agreement with the results obtained with the kinetic theory approach. The analysis is extended to the case of the 14-moment system of a polyatomic gas, and some preliminary results are presented also for this case.

Vorheriger Artikel Analysis of the minimal model for the enthalpy relaxation and recovery in glass transition: application to constant-rate differential scanning calorimetry

Nächster Artikel Elastoplastic buckling of FGM beams in thermal environment

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Titel: Shock structure in extended thermodynamics with second-order maximum entropy principle closure
verfasst von: Andrea Mentrelli
Tommaso Ruggeri
Publikationsdatum: 19.05.2020
Verlag: Springer Berlin Heidelberg
Erschienen in: Continuum Mechanics and Thermodynamics / Ausgabe 1/2021
Print ISSN: 0935-1175
Elektronische ISSN: 1432-0959
DOI: https://doi.org/10.1007/s00161-020-00892-2

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