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Velocity filtration and temperature inversion in a system with long-range interactions

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Abstract

Temperature inversion due to velocity filtration, a mechanism originally proposed to explain the heating of the solar corona, is demonstrated to occur also in a simple paradigmatic model with long-range interactions, the Hamiltonian mean-field model. Using molecular dynamics simulations, we show that when the system settles into an inhomogeneous quasi-stationary state in which the velocity distribution has suprathermal tails, the temperature and density profiles are anticorrelated: denser parts of the system are colder than dilute ones. We argue that this may be a generic property of long-range interacting systems.

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Correspondence to Lapo Casetti.

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Casetti, L., Gupta, S. Velocity filtration and temperature inversion in a system with long-range interactions. Eur. Phys. J. B 87, 91 (2014). https://doi.org/10.1140/epjb/e2014-50136-y

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  • DOI: https://doi.org/10.1140/epjb/e2014-50136-y

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