On the inelastic Boltzmann equation for soft potentials with diffusion. (English) Zbl 1460.76685
Summary: We are concerned with the Cauchy problem of the inelastic Boltzmann equation for soft potentials, with a Laplace term representing the random background forcing. The inelastic interaction here is characterized by the non-constant restitution coefficient. We prove that under the assumption that the initial datum has bounded mass, energy and entropy, there exists a weak solution to this equation. The smoothing effect of weak solutions is also studied. In addition, it is shown the solution is unique and stable with respect to the initial datum provided that the initial datum belongs to \(L^2(R^3)\).
MSC:
| 76P05 | Rarefied gas flows, Boltzmann equation in fluid mechanics |
| 76T25 | Granular flows |
| 74E20 | Granularity |
| 35Q20 | Boltzmann equations |
Keywords:
weak solution existence; Cauchy problem; random background forcing; granular flow; heat bath; non-constant restitution coefficentReferences:
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