Abstract
The evaluation of the entropy production rate on the solar photosphere and its probability distribution are the key issues for studying the non-equilibrium dynamics of the solar convection. The local entropy production rate can be easily evaluated using the vertical heat flux as a proxy, which is given by a product between the line-of-sight velocity and the surface temperature. In this framework, the solar photosphere provides an incomparable laboratory to study turbulent convection in a dissipative non-equilibrium system near a steady state. In this work, we present some preliminary results on statistics of the local entropy production rate via the vertical heat flux, using line-of-sight velocity and temperature maps of the solar photosphere which are extracted from spectro-polarimetric data making use of the Center of Gravity Method and the simple black body radiation law.
Highlights
IOP PublishingEvaluating a proxy of the local entropy production rate on the solar photosphere
Most of the natural systems exist in a non-equilibrium configuration, showing very intriguing dynamics
The local entropy production rate can be evaluated using the vertical heat flux as a proxy, which is given by a product between the line-of-sight velocity and the surface temperature
Summary
Evaluating a proxy of the local entropy production rate on the solar photosphere. G Viavattene, F Berrilli, G Consolini, D Del Moro, F Giannattasio, L Giovannelli, V Penza
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