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On the motion of a body in thermal equilibrium immersed in a perfect gas

Kazuo AokiGuido CavallaroCarlo MarchioroMario Pulvirenti — 2008

ESAIM: Mathematical Modelling and Numerical Analysis

We consider a body immersed in a perfect gas and moving under the action of a constant force. Body and gas are in thermal equilibrium. We assume a stochastic interaction body/medium: when a particle of the medium hits the body, it is absorbed and immediately re-emitted with a Maxwellian distribution. This system gives rise to a microscopic model of friction. We study the approach of the body velocity to the limiting velocity V and prove that, under suitable smallness assumptions, the approach...

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