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http://hdl.handle.net/2122/14303
Authors: | Viavattene, Giorgio* Consolini, Giuseppe* Giovannelli, Luca* Berrilli, Francesco* Del Moro, Dario* Giannattasio, Fabio* Penza, Valentina* Calchetti, Daniele* |
Title: | Testing the Steady-State Fluctuation Relation in the Solar Photospheric Convection | Journal: | Entropy (Basel, Switzerland) | Series/Report no.: | /22 (2020) | Publisher: | MDPI | Issue Date: | 28-Jun-2020 | DOI: | 10.3390/e22070716 | Keywords: | Sun; astrophysical fluid dynamics; convection; fluctuation theorems; non-equilibrium stationary state; photosphere; spectroscopy | Abstract: | The turbulent thermal convection on the Sun is an example of an irreversible non-equilibrium phenomenon in a quasi-steady state characterized by a continuous entropy production rate. Here, the statistical features of a proxy of the local entropy production rate, in solar quiet regions at different timescales, are investigated and compared with the symmetry conjecture of the steady-state fluctuation theorem by Gallavotti and Cohen. Our results show that solar turbulent convection satisfies the symmetries predicted by the fluctuation relation of the Gallavotti and Cohen theorem at a local level. |
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