Diffusion-approximation in stochastically forced kinetic equations - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2017

Diffusion-approximation in stochastically forced kinetic equations

Julien Vovelle

Résumé

We derive the hydrodynamic limit of a kinetic equation where the interactions in velocity are modelled by a linear operator (Fokker-Planck or Linear Boltzmann) and the force in the Vlasov term is a stochastic process with high amplitude and short-range correlation. In the scales and the regime we consider, the hydrodynamic equation is a scalar second-order stochastic partial differential equation. Compared to the deterministic case, we also observe a phenomenon of enhanced diffusion.
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Dates et versions

hal-01567138 , version 1 (21-07-2017)
hal-01567138 , version 2 (13-11-2017)
hal-01567138 , version 3 (22-03-2018)
hal-01567138 , version 4 (07-06-2019)
hal-01567138 , version 5 (30-01-2020)
hal-01567138 , version 6 (17-03-2020)

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A Debussche, Julien Vovelle. Diffusion-approximation in stochastically forced kinetic equations. 2017. ⟨hal-01567138v2⟩
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