Volume 8, August 2004
|Page(s)||36 - 55|
|Published online||15 September 2004|
Pointwise convergence of Boltzmann solutions for grazing collisions in a Maxwell gas via a probabilitistic interpretation
Université Paris 10, UFR SEGMI, Modal'X, 200 avenue de la République, 92000 Nanterre, France; email@example.com.
Revised: 27 November 2002
Using probabilistic tools, this work states a pointwise convergence of function solutions of the 2-dimensional Boltzmann equation to the function solution of the Landau equation for Maxwellian molecules when the collisions become grazing. To this aim, we use the results of Fournier (2000) on the Malliavin calculus for the Boltzmann equation. Moreover, using the particle system introduced by Guérin and Méléard (2003), some simulations of the solution of the Landau equation will be given. This result is original and has not been obtained for the moment by analytical methods.
Mathematics Subject Classification: 60J75 / 60H10 / 60H07 / 82C40
Key words: Boltzmann equation without cutoff for a Maxwell gas / Landau equation for a Maxwell gas / nonlinear stochastic differential equations / Malliavin calculus.
© EDP Sciences, SMAI, 2004
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