Global Solution to Enskog Equation with External Force in Infinite Vacuum

Details Global Solution to Enskog Equation with External Force in Infinite Vacuum Global Solution to Enskog Equation with External Force in Infinite Vacuum

2008-05-31

arxiv.org/abs/0806.0082v1

Physics

Mathematical Physics

Scientific paper

We first give hypotheses of the bicharacteristic equations corresponding to the Enskog equation with an external force. Since the collision operator of the Enskog equation is more complicated than that of the Boltzmann equation, these hypotheses are more complicated than those given by Duan et al. for the Boltzmann equation. The hypotheses are very related to collision of particles of moderately or highly dense gases along the bicharacteristic curves and they can be used to make the estimation of the so-called gain and loss integrals of the Enskog integral equation. Then, by controlling these integrals, we show the existence and uniqueness of the global mild solution to the Enskog equation in an infinite vacuum for moderately or highly dense gases. Finally, we make some remarks on the locally Lipschitz assumption of the collision factors in the Enskog equation.

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