| Structures hétérogènes |  |
| Structures hétérogènes | |
| HAL : hal-00608036, version 1 |
| arXiv : 1107.1766 |
| DOI : 10.1103/PhysRevE.84.061108 |
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| Physical Review E 84 (2011) 061108 |
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| Negative thermal conductivity of chains of rotors with mechanical forcing |
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| Alessandra Iacobucci 1Frédéric Legoll 2, 3 |
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| (06/12/2011) |
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| We consider chains of rotors subjected to both thermal and mechanical forcings,in a nonequilibrium steady-state. Unusual nonlinear profiles of temperature and velocities are observed in the system. In particular, the temperature is maximal in the center, which is an indication of the nonlocal behavior of the system. In spite of that, local equilibrium holds for long enough chains. Our numerical results also show that, when the mechanical forcing is strong enough, the energy current can be increased by an inverse temperature gradient. This counterintuitive result again reveals the complexity of nonequilibrium states. |
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| 1 : | CEntre de REcherches en MAthématiques de la DEcision (CEREMADE) |
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CNRS : UMR7534 – Université Paris IX - Paris Dauphine |
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| 2 : | Laboratoire Navier |
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Ecole des Ponts ParisTech – CNRS : UMR8205 – IFSTTAR |
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| 3 : | MICMAC (INRIA Paris - Rocquencourt) |
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Ecole des Ponts ParisTech – INRIA |
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| 4 : | Centre d'Enseignement et de Recherche en Mathématiques et Calcul Scientifique (CERMICS) |
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Ecole des Ponts ParisTech |
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| Multi-échelle |
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| Domaine | : | Physique/Matière Condensée/Mécanique statistique |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/1107.1766 |
| hal-00608036, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00608036 | |
| oai:hal.archives-ouvertes.fr:hal-00608036 | |
| Contributeur : Gabriel Stoltz | |
| Soumis le : Mardi 12 Juillet 2011, 06:58:55 | |
| Dernière modification le : Mardi 10 Janvier 2012, 20:33:46 | |
